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Electricity:
Electricity production generates the largest share of greenhouse gas emissions. Approximately 67 percent of our electricity comes from burning fossil fuels, mostly coal and natural gas.
Transportation:
Greenhouse gas emissions from transportation primarily come from burning fossil fuel for our cars, trucks, ships, trains, and planes. Over 90 percent of the fuel used for transportation is petroleum based, which includes gasoline and diesel.
Agriculture:
Greenhouse gas emissions from agriculture come from livestock such as cows, agricultural soils, and rice production.
Industry:
Greenhouse gas emissions from industry primarily come from burning fossil fuels for energy, as well as greenhouse gas emissions from certain chemical reactions necessary to produce goods from raw materials.
Greenhouse gas emissions have increased from year to year. Emissions can rise and fall due to changes in the economy, the price of fuel, and other factors. In 2016, U.S. greenhouse gas emissions increased compared to 2015 levels. This increase was due to a number of factors, including: cold winter conditions resulting in an increase in fuel demand, especially in residential and commercial sectors; an increase in transportation emissions resulting from an increase in vehicle miles traveled; and an increase in industrial production across multiple sectors that also resulted in increases in industrial sector emissions. are:
The primary sources of greenhouse gas emissions in the United States ARE: