GEOLOGY

Detailed explanation-1: -The largest source of greenhouse gas emissions from human activities in the United States is from burning fossil fuels for electricity, heat, and transportation.

Detailed explanation-2: -The Energy Sector Produces the Most Greenhouse Gas Emissions The energy sector includes transportation, electricity and heat, buildings, manufacturing and construction, fugitive emissions and other fuel combustion.

Detailed explanation-3: -Annual greenhouse gas emissions by sector Here we see that electricity and heat production are the largest contributor to global emissions. This is followed by transport, manufacturing and construction (largely cement and similar materials), and agriculture.

Detailed explanation-4: -Transport is responsible for about one-quarter of all greenhouse gas emissions.

Detailed explanation-5: -The biggest contributors to this were cars and taxis, which made up 52% of the emissions from domestic transport (51 MtCO2e ), Heavy Goods Vehicles (HGVs) (19% of domestic transport emissions, 18.6 MtCO2e ) and vans (16% of emissions, 16 MtCO2e ). Total domestic emissions fell by 42.4 MtCO2e in 2020.