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U.S. global warming emissions
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Electricity: Emissions from electric power
generation have been growing at nearly 2% per year since 1990. Less than 3% of
our electric power production is from new renewable sources such as wind and
solar. Over 70% is from fossil fuels, with coal accounting for half of all
electric power.
Transportation: Emissions from transportation
have been growing at nearly 2% per year since 1990. Miles traveled have
steadily increased, and fuel economy has been stagnant. The exception is
aircraft, which have become significantly more fuel efficient over that
period.
Heat & hot water: This sector includes fuel
combustion for heating, cooking, hot water, steam production, and similar
processes.
Other energy: This sector includes emissions
from energy-related sources other than fossil fuel combustion, including
releases from natural gas pipelines, coal mining, and non-energy uses such as
Liquid Petroleum Gas.
Agriculture: Agriculture's non-energy emissions
are dominated by soil treatments (including nitrogen fertilizers, manure and
sludge application, tillage, etc.), enteric fermentation (ie., methane
released by beef and dairy cattle), and methane released from manure stored in
lagoons and pits.
Industrial processes: Non-energy emissions from
industry are dominated by iron and steel production, cement production, and
fluorinated gases used as substitutes for ozone-depleting HFCs.
Solid waste and wastewater treatment: Landfills
are responsible for 25% of all methane emissions. Wastewater treatment produces about 7% of methane emissions.
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