Waste Transfer Stations: A Manual for Decision-Making. Carbon dioxide emissions per smartphone charged were determined by multiplying the energy use per smartphone charged by the national weighted average carbon dioxide marginal emission rate for delivered electricity. ∆LOrganic = Annual change in emissions from drained organic soils per hectare, EFcropland= 13.17 metric tons C/hectare/year (average of emission factors for drained organic cropland soils in sub-tropical, cold temperate, and warm temperate climates in the United States) (EPA 2019), EFforestland= 2.60 + 0.31 = 2.91 metric tons C/hectare/year (emission factors for temperate drained organic forest soils) (IPCC 2014), ∆Lorganic = 13.17 - 2.91 = 10.26 metric tons C/hectare/year emitted. U.S. Energy Information Administration, 1000 Independence Ave., SW, Washington, DC 20585, Biofuels: Ethanol and Biomass-based diesel, Residential Energy Consumption Survey (RECS), Commercial Buildings Energy Consumption Survey (CBECS). Intergovernmental Panel on Climate Change, Geneva, Switzerland, Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2017. 2.32 MWaverage capacity x 0.34 x 8,760 hours/year x 1,000 kWh/MWh x 6.6204 x 10-4 metric tons CO2/kWh reduced = 4,632 metric tons CO2/year/wind turbine installed. Smith, J., Heath, L., & Nichols, M. (2010). Annual energy consumed by a light bulb is calculated by multiplying the power (43 watts) by the average daily use (3 hours/day) by the number of days per year (365). Most users of the Equivalencies Calculator who seek equivalencies for electricity-related emissions want to know equivalencies for emissions reductions from energy efficiency (EE) or renewable energy (RE) programs. Total home electricity, natural gas, distillate fuel oil, and liquefied petroleum gas consumption figures were converted from their various units to metric tons of CO2 and added together to obtain total CO2 emissions per home. For reference, to obtain the number of grams of CO2 emitted per gallon of gasoline combusted, the heat content of the fuel per gallon can be multiplied by the kg CO2 per heat content of the fuel. Assuming an average daily use of 3 hours per day, an incandescent bulb consumes 47.1 kWh per year, and an LED bulb consumes 9.9 kWh per year (EPA 2016). International energy information, including overviews, rankings, data, and analyses. According to U.S. DOE, the 24-hour energy consumed by a common smartphone battery is 14.17 Watt-hours (DOE 2019). This calculation, also found in the Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990–2017 (EPA 2019), uses the USDA Forest Service estimates of carbon stocks in 2018 minus carbon stocks in 2017. Reports requested by congress or otherwise deemed important. This includes the amount of energy needed to charge a fully depleted smartphone battery and maintain that full charge throughout the day. Direct methane emissions released to the atmosphere (without burning) are about 25 times more powerful than CO2 in terms of their warming effect on the atmosphere. The national weighted average carbon dioxide marginal emission rate for delivered electricity in 2018 was 1,558.8 lbs CO2 per megawatt-hour, which accounts for losses during transmission and distribution (EPA 2019). Electricity cost calculator: 18.1p per kWh and a standing charge of 22.0p per day Economy 7 cost calculator: 8.5p per kWh off peak The change in emissions from drained organic soils per hectare is estimated as the difference between emission factors for drained organic forest soils and drained organic cropland soils. These rates can be adjusted using the sliders. (This calculation includes carbon stocks in the aboveground biomass, belowground biomass, dead wood, litter, and soil organic and mineral carbon pools. ), Annual Net Change in Carbon Stocks in Year 2017 = 57,687 MMT C – 57,546 MMT C = 141 MMT C. Step 2: Determine the annual net change in carbon stocks (i.e., sequestration) per area by dividing the carbon stock change in U.S. forests from Step 1 by the total area of U.S. forests remaining in forests in year t (i.e., the area of land that did not change land-use categories between the time periods). The U.S. annual wind national marginal emission rate to convert reductions of kilowatt-hours into avoided units of carbon dioxide emissions is 6.62 x 10-4 (EPA 2019). hectares × 103) = -0.52 metric tons of carbon sequestered per hectare per year*. hectares × 103) = 210 metric tons of carbon stored per hectare, Annual Net Change in Carbon Stock per Area in Year 2017 = (-141.2 MMT C  × 106) / (273,623 thou. Waste Reduction Model (WARM), Version 15. Crude oil, gasoline, heating oil, diesel, propane, and other liquids including biofuels and natural gas liquids. Please note the following caveats to these assumptions: To convert to units of metric tons CO2 per tree, multiply by the ratio of the molecular weight of carbon dioxide to that of carbon (44/12) and the ratio of metric tons per pound (1/2,204.6). For example, the number 525,000,000 could be written as 5.25E+08. Carbon dioxide emissions reduced per garbage truck full of waste were determined by multiplying emissions avoided from recycling instead of landfilling 1 ton of waste by the amount of waste in an average garbage truck. The average wind capacity factor in the U.S. in 2017 was 34 percent (DOE 2018). These estimates are based on the following assumptions: The estimates of carbon sequestered by coniferous and deciduous trees were then weighted by the percent share of coniferous versus deciduous trees in cities across the United States. Also note that this estimate includes both mineral soil and organic soil carbon stocks. Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2017. One food calorie is equal to 1,000 calories, or 1 kilocalorie. The nursery-grown trees are then planted in a suburban/urban setting; the trees are not densely planted. U.S. Department of Energy, Energy Efficiency and Renewable Energy Division, Compliance Certification Database. Annual Net Change in Carbon Stocks per Area in Year t = (Carbon Stocks(t+1) - Carbon Stockst)/Area of land remaining in the same land-use category, Step 1: Determine the carbon stock change between years by subtracting carbon stocks in year t from carbon stocks in year (t+1). The average carbon dioxide coefficient of distillate fuel oil is 429.61 kg CO2 per 42-gallon barrel (EPA 2018). Savings Calculator for ENERGY STAR Qualified Light Bulbs. A small exhaust fan left running at night can be easily overlooked, but you may be surprised by the energy cost of leaving it on. To determine annual greenhouse gas emissions per mile, the following methodology was used: carbon dioxide emissions per gallon of gasoline were divided by the average fuel economy of vehicles to determine carbon dioxide emitted per mile traveled by a typical passenger vehicle. [14.17 Wh – (22 hours x 0.14 Watts)] x 1 kWh/1,000 Wh = 0.011 kWh/smartphone charged, 0.011 kWh/charge x 1,558.8 pounds CO2/MWh delivered electricity x 1 MWh/1,000 kWh x 1 metric ton/2,204.6 lbs = 7.84 x 10-6 metric tons CO2/smartphone charged. Exploration and reserves, storage, imports and exports, production, prices, sales. U.S. Carbon dioxide emissions were then divided by the ratio of carbon dioxide emissions to total vehicle greenhouse gas emissions to account for vehicle methane and nitrous oxide emissions. Carbon dioxide emissions per therm are determined by converting million British thermal units (mmbtu) to therms, then multiplying the carbon coefficient times the fraction oxidized times the ratio of the molecular weight of carbon dioxide to carbon (44/12). The average carbon coefficient of coal combusted for electricity generation in 2017 was 26.08 kilograms carbon per mmbtu (EPA 2019). Voluntary Reporting of Greenhouse Gases, U.S. Department of Energy, Energy Information Administration. When it comes to grow lights we have what you’re looking for, grow light bulbs and lamps, grow light hangers, grow light timers, grow light parts, grow light accessories and power cords for grow lights. To estimate carbon sequestered (in metric tons of CO2) by additional forestry acres in one year,  multiply the number of additional acres by -0.77 metric ton CO2 acre/year. In 2017, the weighted average combined fuel economy of cars and light trucks was 22.3 miles per gallon (FHWA 2019). Note: When using this equivalency, please keep in mind that it represents the CO2 equivalency of CO2 released for natural gas burned as a fuel, not natural gas released to the atmosphere. See, Go to the equivalencies calculator page for more information, Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards; Final Rule, page 25,330 (PDF), 2006 IPCC Guidelines for National Greenhouse Gas Inventories. McPherson, E. G.; van D. N. S.; Peper, P. J. 2. EIA's free and open data available as API, Excel add-in, bulk files, and widgets. Pervasive Computing, pp.19-33. Go to the equivalencies calculator page for more information. Carbon stock change in soils is time-dependent, with a default time period for transition between equilibrium soil carbon values of 20 years for soils in cropland systems (IPCC 2006). The Greenhouse Gas Equivalencies Calculator uses the AVoided Emissions and geneRation Tool ... 0.50, and 0.49 quadrillion Btu, respectively, in 2018 (EIA 2019a). Significant geographical variations underlie the national estimates, and the values calculated here might not be representative of individual regions, states, or changes in the species composition of additional acres of forest. *Negative values indicate carbon sequestration. An official website of the United States government. Propane cylinders vary with respect to size; for the purpose of this equivalency calculation, a typical cylinder for home use was assumed to contain 18 pounds of propane. Ferreira, D., Dey, A. K., & Kostakos, V. (2011). Urban tree database and allometric equations. 8.89 × 10-3 metric tons CO2/gallon gasoline × 11,484 VMT car/truck average × 1/22.3 miles per gallon car/truck average × 1 CO2, CH4, and N2O/0.989 CO2 = 4.63 metric tons CO2E/vehicle /year. (U = 1/R, so a window listed with a U of 0.33 has an R value of 3) Area (sqft) Rvalue UA (BTU/hr-F) Design Loss (BTU/hr) Yearly Heat Loss (million BTU/yr) (2016). Maps by energy source and topic, includes forecast maps. Maps, tools, and resources related to energy disruptions and infrastructure. For example, the energy in a 300-food calorie ice cream cone is about the same as the amount of electricity required to light a 100-watt incandescent light bulb for 3.5 hours. The Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990–2017 estimates emissions from drained organic soils using U.S.-specific emission factors for cropland and IPCC (2014) default emission factors for forestland (EPA 2019). Carbon dioxide emissions per power plant were calculated by dividing the total emissions from power plants whose primary source of fuel was coal by the number of power plants. Hancock (2001). To estimate CO2 not emitted when an acre of forest is preserved from conversion to cropland, simply multiply the number of acres of forest not converted by -147.83 mt CO2/acre/year. Therefore, AVERT provides a national marginal emission factor for the Equivalencies Calculator. Growing forests accumulate and store carbon. The average carbon dioxide coefficient of liquefied petroleum gases is 235.7 kg CO2 per 42-gallon barrel (EPA 2018). The fraction oxidized to CO2 is 100 percent (IPCC 2006). This estimate is composed of the five carbon pools: aboveground biomass (54 metric tons C/hectare), belowground biomass (11 metric tons C/hectare), dead wood (10 metric tons C/hectare), litter (13 metric tons C/hectare), and soil carbon, which includes mineral soils (102 metric tons C/hectare) and organic soils (21 metric tons C/hectare). Of a sample of approximately 11,000 coniferous and deciduous trees in seventeen major U.S. cities, approximately 11 percent and 89 percent of sampled trees were coniferous and deciduous, respectively (McPherson et al. The emission factors for drained organic soil on temperate forestland are 2.60 metric tons C/hectare/year and 0.31 metric tons C/hectare/year (EPA 2019, IPCC 2014), and the average emission factor for drained organic soil on cropland for all climate regions is 13.17 metric tons C/hectare/year (EPA 2019). In 2017, the average nameplate capacity of wind turbines installed in the U.S. was 2.32 MW (DOE 2018). 2.94 metric tons CO2 equivalent/ton of waste recycled instead of landfilled. Note that this represents CO2 avoided in the year of conversion. For example, the energy in a 300-food calorie ice cream cone is about the same as the amount of electricity required to light a 100-watt incandescent light bulb for 3.5 hours. The amount of carbon dioxide emitted per gallon of motor gasoline burned is 8.89 × 10-3 metric tons, as calculated in the “Gallons of gasoline consumed” section above. The data are from the Annual Energy Outlook 2019, Table A8: Electricity Supply, Disposition, Prices, and Emissions available at: https://www.eia.gov/outlooks/aeo/. United States Environmental Protection Agency, You may need a PDF reader to view some of the files on this page. The rate of accumulation is equal to growth minus removals (i.e., harvest for the production of paper and wood) minus decomposition. The average heat content of coal consumed by the electric power sector in the U.S. in 2017 was 20.92 mmbtu per metric ton (EIA 2019). Annex 2 (Methodology for estimating CO, 2019 Annual Energy Outlook, Table A4: Residential Sector Key Indicators and Consumption, 2019 Annual Energy Outlook, Table A8: Electricity Supply, Disposition, Prices, and Emissions. Based on data developed by the USDA Forest Service for the Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990–2017, the carbon stock density of U.S. forests in 2017 was 210 metric tons of carbon per hectare (or 85 metric tons of carbon per acre) (EPA 2019). Forests are defined herein as managed forests that have been classified as forests for over 20 years (i.e., excluding forests converted to/from other land-use types). Ventilation Cost Calculator. These values are summed for the 10-year period, beginning from the time of planting, to derive the estimate of 23.2 lbs of carbon per coniferous tree or 38.0 lbs of carbon per deciduous tree. Averaged across households in the United States, this amounts to 40,190 cubic feet of natural gas, 45 gallons of liquefied petroleum gas, and 29 gallons of fuel oil per home. For example, 5.25E-03 is the same as 0.00525. The average heat content of coal consumed by the electric power sector in the U.S. in 2017 was 20.92 mmbtu per metric ton (EIA 2019). Food calories are a measure of energy in food. You’ll find the very best grow light selection for indoor gardening, aquaponics and hydroponics at Hawthorne Gardening Company. Come test out some of the products still in development and let us know what you think! Sales, revenue and prices, power plants, fuel use, stocks, generation, trade, demand & emissions. Greenhouse Heater Size Calculator: Surface Area of Structure - This is the total square feet of exposed surface area (this is not length x width) your structure has (don't include floor).To find out the surface area of a greenhouse we sell, click here.To find the surface area of a different greenhouse, click here to use our greenhouse area calculators. Hawthorne Gardening Company stocks the full … In 2017, the weighted average combined fuel economy of cars and light trucks was 22.3 miles per gallon (FHWA 2019). Through the process of photosynthesis, trees remove CO2 from the atmosphere and store it as cellulose, lignin, and other compounds. 1 The annual 2018 U.S. transmission and distribution losses were determined as ((Net Generation to the Grid + Net Imports – Total Electricity Sales)/Total Electricity Sales) (i.e., (4,003 + 54 –3,796)/3,796 = 6.87%). To convert to carbon dioxide, multiply by the ratio of the molecular weight of carbon dioxide to that of carbon (44/12), to yield a value of -365.29 metric tons CO2/hectare/year (or -147.83 metric tons CO2/acre/year) in the year of conversion. 2013 Supplement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories: Wetlands. The amount of carbon dioxide emitted per gallon of motor gasoline burned is 8.89 × 10-3 metric tons, as calculated in the “Gallons of gasoline consumed” section above. Consequently, it is assumed that the change in equilibrium soil carbon will be annualized over 20 years to represent the annual flux in mineral and organic soils. View Our Selection of Greenhouse Heaters. 20.92 mmbtu/metric ton coal × 26.08 kg C/mmbtu × 44 kg CO2/12 kg C × 1 metric ton coal/2,204.6 pound of coal x 1 metric ton/1,000 kg = 9.08 x 10-4 metric tons CO2/pound of coal. 1,140,649,958.9 metric tons of CO2 × 1/293 power plants =  3,893,003.27 metric tons CO2/power plant. The energy cost calculator assumes the prices below and that 40% of Economy 7 electricity consumption is at the night rate. The average carbon coefficient of coal combusted for electricity generation in 2017 was 26.08 kilograms carbon per mmbtu (EPA 2019). Energy use in homes, commercial buildings, manufacturing, and transportation. Carbon dioxide emissions per ton of coal were determined by multiplying heat content times the carbon coefficient times the fraction oxidized times the ratio of the molecular weight of carbon dioxide to that of carbon (44/12). Where do hydrocarbon gas liquids come from? State energy information, including overviews, rankings, data, and analyses. The average vehicle miles traveled (VMT) in 2017 was 11,484 miles per year (FHWA 2019). When calculating carbon stock changes in biomass due to conversion from forestland to cropland, the IPCC guidelines indicate that the average carbon stock change is equal to the carbon stock change due to removal of biomass from the outgoing land use (i.e., forestland) plus the carbon stocks from one year of growth in the incoming land use (i.e., cropland), or the carbon in biomass immediately after the conversion minus the carbon in biomass prior to the conversion plus the carbon stocks from one year of growth in the incoming land use (i.e., cropland) (IPCC 2006). 0.1 mmbtu/1 therm × 14.43 kg C/mmbtu × 44 kg CO2/12 kg C × 1 metric ton/1,000 kg = 0.0053 metric tons CO2/therm. Volume 2 (Energy). 86 p. Method for Calculating Carbon Sequestration by Trees in Urban and Suburban Settings. The average carbon coefficient of crude oil is 20.31 kg carbon per mmbtu (EPA 2019). Our greenhouse kits fit a wide variety of applications, from utilitarian to luxury show pieces. For example, after 5 years (one year in the nursery and 4 in the urban setting), the probability of survival is 68 percent; after 10 years, the probability declines to 59 percent. U.S. Environmental Protection Agency, Washington, DC. Greenhouse gas data, voluntary reporting, electric power plant emissions. (AVERT, U.S. national weighted average CO2 marginal emission rate, year 2018 data). Electricity: 12,146 kWh per home × 998 lbs CO2 per megawatt-hour generated × (1/(1-0.069)) MWh generated/MWh delivered × 1 MWh/1,000 kWh × 1 metric ton/2,204.6 lb = 5.906 metric tons CO2/home. Monthly and yearly energy forecasts, analysis of energy topics, financial analysis, congressional reports. Emissions from drained organic soils in forestland and drained organic soils in cropland vary based on the drainage depth and climate (IPCC 2006). Reserves, production, prices, employment and productivity, distribution, stocks, imports and exports. Please note that this is an estimate for “average” U.S. forests in 2017; i.e., for U.S. forests as a whole in 2017. To estimate losses of growing trees, in lieu of a census conducted to accurately account for the total amount of seedlings planted versus surviving to a certain age, the sequestration rate (in lbs per tree) is multiplied by the survival factor to yield a probability-weighted sequestration rate. Table VM-1. The Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990–2017 (EPA 2019) provides data on the net change in forest carbon stocks and forest area. Tools to customize searches, view specific data sets, study detailed documentation, and access time-series data. Intergovernmental Panel on Climate Change, Geneva, Switzerland. Organic soils also emit CO2 when drained. Immediately after conversion from forestland to cropland, biomass is assumed to be zero, as the land is cleared of all vegetation before planting crops), ∆CL = annual decrease in biomass stocks due to losses from harvesting, fuel wood gathering, and disturbances on land converted to other land-use category (assumed to be zero). Therefore, the carbon stock in cropland after one year of growth is estimated to be 2.25 metric tons C per hectare (or 0.91 metric tons C per acre). Carbon dioxide emissions reduced per trash bag full of waste were determined by multiplying emissions avoided from recycling instead of landfilling 1 ton of waste by the amount of waste in an average trash bag. Annual home electricity consumption was multiplied by the carbon dioxide emission rate (per unit of electricity delivered) to determine annual carbon dioxide emissions per home. A negative number after the E means the decimal should be moved a certain number of places to the left. Monthly Energy Review March 2019, Table A5: Approximate Heat Content of Coal and Coal Coke. Carbon dioxide emissions per therm can be converted to carbon dioxide emissions per thousand cubic feet (Mcf) using the average heat content of natural gas in 2017, 10.37 therms/Mcf (EIA 2019). Measuring energy in food. 2016). Gen. Tech. 10,180 grams of CO2/gallon of diesel = 10.180 × 10-3 metric tons CO2/gallon of diesel. EPA (2016). Food calories are a measure of energy in food. Whether you are growing in raised beds, 5 gallon buckets, or pots, our soil calculator has the flexibility to mix and match any combination of … The medium growth coniferous and deciduous trees are raised in a nursery for one year until they become 1 inch in diameter at 4.5 feet above the ground (the size of tree purchased in a 15-gallon container). Liquid petroleum gas: 45.4 gallons per home × 1/42 barrels/gallon × 235.7 kg CO2/barrel × 1/1,000 kg/metric ton = 0.25 metric tons CO2/home, 4. See EPA’s About PDF page to learn more. Financial market analysis and financial data for major energy companies. 8.89 × 10-3 metric tons CO2/gallon gasoline × 1/22.3 miles per gallon car/truck average × 1 CO2, CH4, and N2O/0.989 CO2 = 4.03 x 10-4 metric tons CO2E/mile. The amount of coal in an average railcar was assumed to be 100.19 short tons, or 90.89 metric tons (Hancock 2001). You may need a PDF reader to view some of the files on this page. U.S. Environmental Protection Agency (PDF), Volume-to-Weight Conversion Factors (PDF), 2017 Wind Technologies Market Report (98 pp, 2.47 MB). Annual Change in Biomass Carbon Stocks on Land Converted to Other Land-Use Category, ∆CB = annual change in carbon stocks in biomass on land converted to another land-use category (i.e., change in biomass on land converted from forest to cropland), ∆CG = annual increase in carbon stocks in biomass due to growth on land converted to another land-use category (i.e., 2.25 metric tons C/hectare on cropland one year after conversion from forestland), CConversion =initial change in carbon stocks in biomass on land converted to another land-use category. The +08 indicates the decimal should be moved eight places to the right. 1,558.8 lbs CO2/MWh × (4.536 × 10-4 metric tons/lb) × 0.001 MWh/kWh = 7.07 × 10-4 metric tons CO2/kWh 0.0053 metric tons CO2­/therm x 10.37 therms/Mcf = 0.0549 metric tons CO2/Mcf. Monthly Energy Review March 2019, Table A4: Approximate Heat Content of Natural Gas for End-Use Sector Consumption. Calculating the emission impacts of EE and RE on the electricity grid requires estimating the amount of fossil-fired generation and emissions being displaced by EE and RE. Carbon dioxide emissions reduced per light bulb switched from an incandescent bulb to a light-emitting diode bulb are calculated by multiplying annual energy savings by the national weighted average carbon dioxide marginal emission rate for delivered electricity. Sign up for email subcriptions to receive messages about specific EIA products. The volume of a standard-sized trash bag was assumed to be 25 gallons, based on a typical range of 20 to 30 gallons (EPA 2016b). Whether you're a veteran or beginner, Greenhouse Megastore has the right greenhouse kit for you! Carbon dioxide emissions avoided per year per wind turbine installed were determined by multiplying the average electricity generated per wind turbine in a year by the annual wind national marginal emission rate (EPA 2019). In most U.S. forests, growth exceeds removals and decomposition, so the amount of carbon stored nationally is increasing overall, though at a decreasing rate. Yearly Heat Loss (million BTU/yr) wall 1: wall 2: wall 3: wall 4: Windows & Doors Enter the area and R value for each group of windows or doors having the same R value. Electricity generation from an average wind turbine was determined by multiplying the average nameplate capacity of a wind turbine in the United States (2.32 MW) by the average U.S. wind capacity factor (0.34) and by the number of hours per year. The fraction oxidized to CO2 is 100 percent (IPCC 2006). The national average carbon dioxide output rate for generated electricity in 2016 was 998.4 lbs CO2 per megawatt-hour (EPA 2018), which translates to about 1,072.1 lbs CO2 per megawatt-hour for delivered electricity (assuming transmission and distribution losses of 6.9%) (EPA 2018; EIA 2019b).1. While most trees take 1 year in a nursery to reach the seedling stage, trees grown under different conditions and trees of certain species may take longer: up to 6 years. The calculation takes into account “survival factors” developed by U.S. DOE (1998). 2006 IPCC Guidelines for National Greenhouse Gas Inventories. The national weighted average carbon dioxide marginal emission rate for delivered electricity in 2018 was 1,558.8 lbs CO2 per megawatt-hour, which accounts for losses during transmission and distribution (EPA 2019). Forms EIA uses to collect energy data including descriptions, links to survey instructions, and additional information. To determine annual greenhouse gas emissions per passenger vehicle, the following methodology was used: VMT was divided by average gas mileage to determine gallons of gasoline consumed per vehicle per year. -0.21 metric ton C/acre/year* × (44 units CO2/12 units C) = -0.77 metric ton CO2/acre/year sequestered annually by one acre of average U.S. forest. Applying the Step 2 calculation to data developed by the USDA Forest Service for the Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990–2017 yields a result of 210 metric tons of carbon per hectare (or 85 metric tons of carbon per acre) for the carbon stock density of U.S. forests in 2017, with an annual net change in carbon stock per area in 2017 of 0.52 metric tons of carbon sequestered per hectare per year (or 0.21 metric tons of carbon sequestered per acre per year). Comprehensive data summaries, comparisons, analysis, and projections integrated across all energy sources. On average, each home consumed 12,146 kWh of delivered electricity. Propane is 81.7 percent carbon (EPA 2019). Carbon Stock Density in Year 2017 = (57,546 MMT C × 106) / (273,623 thou. Lesson plans, science fair experiments, field trips, teacher guide, and career corner. Carbon sequestration is dependent on growth rate, which varies by location and other conditions. The averaged reference soil carbon stock (for high-activity clay, low-activity clay, sandy soils, and histosols for all climate regions in the United States) is 40.83 metric tons C/hectare (EPA 2019). Environmental Protection Agency, Washington, D.C. EPA #430-R-19-001 (PDF). Uranium fuel, nuclear reactors, generation, spent fuel. Natural gas: 40,190 cubic feet per home × 0.0549 kg CO2/cubic foot × 1/1,000 kg/metric ton = 2.21 metric tons CO2/home, 3. Total CO2 emissions for energy use per home: 5.906 metric tons CO2 for electricity + 2.21 metric tons CO2 for natural gas + 0.25 metric tons CO2 for liquid petroleum gas + 0.30 metric tons CO2 for fuel oil = 8.67 metric tons CO2 per home per year. The Greenhouse Gas Equivalencies Calculator uses the AVoided Emissions and geneRation Tool (AVERT) U.S. national weighted average CO2 marginal emission rate to convert reductions of kilowatt-hours into avoided units of carbon dioxide emissions.