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Slowing Global Warming Biotically
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acreage acres of forest additional agricultural land America the Beautiful American analysis annual areas atmospheric CO2 average biofuels biomass energy biotic carbon biotic options biotic policy options Birdsey carbon benefit carbon cycle carbon emissions carbon flows carbon per acre carbon reservoirs carbon storage Climate Change CO2 emissions cost-effective costs crop cropland decades Department of Agriculture displace economic effect environmental erosion esti estimated estry federal Figure forest cover forest management Forest Service forested lands fossil fuel fossil fuel emissions growth rates harvesting incentives James Gustave Speth land conversions land-use large-scale long-term million acres million tons national forests offset old-growth forest percent plantations planting trees potential private lands public lands reduce reforestation released Research significant soil carbon stocks stored timberlands tion tons of carbon tons per acre tree cover tropical U.S. carbon U.S. Department U.S. forests United urban forests USFS vegetation wood products World Resources Institute