This authoritative source explains the sources of greenhouse gases. I was surprised about nitrous oxide.
Quote: << Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere over the last 150 years.1 >>
Overview:
https://www.epa.gov/ghgemissions/overview-greenhouse-gases
It has a link to an annual report “Inventory of US greenhouse gas emissions and sinks”.
https://www.epa.gov/ghgemissions/sources-greenhouse-gas-emissions
