Question

where do greenhouse gases come from?​

Answer 1

Answer:

Mostly the big industries and greenhouses

Explanation:

The largest source of greenhouse gas emissions from human activities in the United States is from burning fossil fuels for electricity, heat, and transportation. Approximately 63 percent of our electricity comes from burning fossil fuels, mostly coal and natural gas.

Happy to answer your question

Answer 2

Answer:

lots of places, such as:

farming cows (methane and C02)

anaerobic decay (methane)

burning fossil fuels or wood (C02)

rice farms (methane)

deforestation (CO2)

using fertilisers (nitrous oxides)

refrigerants (Chlorofluorocarbon-12 (CFC-12))

etc.

hope it helps:)