https://19january2021snapshot.epa.gov/global-mitigation-non-co2-greenhouse-gases/global-non-co2-ghg-emissions-1990-2030_.html monthly 1.00 https://19january2021snapshot.epa.gov/global-mitigation-non-co2-greenhouse-gases/global-non-co2-greenhouse-gas-emission-projections_.html monthly 0.80 https://19january2021snapshot.epa.gov/global-mitigation-non-co2-greenhouse-gases/global-mitigation-non-co2-ghgs-report-2010-2030_.html monthly 0.80 https://19january2021snapshot.epa.gov/global-mitigation-non-co2-greenhouse-gases/forms/contact-us-about-global-mitigation-non-co2-report_.html monthly 0.80