How Do Human Activities Contribute to Climate Change and How Do They Compare With Natural Influences?
http://www.eea.europa.eu/themes/climate/faq/how-do-human-activities-contribute-to-climate-change-and-how-do-they-compare-with-natural-influences
How Much Does Human Activity Affect Climate Change?
https://ncse.com/library-resource/how-much-does-human-activity-affect-climate-change
Global Greenhouse Emissions Data
https://www.epa.gov/ghgemissions/global-greenhouse-gas-emissions-data
Global Greenhouse Emissions Graph Sources
https://www.epa.gov/ghgemissions/us-greenhouse-gas-inventory-report-1990-2014
The Montreal Protocol on Substances That Deplete the Ozone Layer
http://ozone.unep.org/en/treaties-and-decisions/montreal-protocol-substances-deplete-ozone-layer
Montreal Protocol - International Treaty
https://www.britannica.com/event/Montreal-Protocol
Montreal Protocol – Wikipedia
https://en.wikipedia.org/wiki/Montreal_Protocol#History
http://www.eea.europa.eu/themes/climate/faq/how-do-human-activities-contribute-to-climate-change-and-how-do-they-compare-with-natural-influences
How Much Does Human Activity Affect Climate Change?
https://ncse.com/library-resource/how-much-does-human-activity-affect-climate-change
Global Greenhouse Emissions Data
https://www.epa.gov/ghgemissions/global-greenhouse-gas-emissions-data
Global Greenhouse Emissions Graph Sources
https://www.epa.gov/ghgemissions/us-greenhouse-gas-inventory-report-1990-2014
The Montreal Protocol on Substances That Deplete the Ozone Layer
http://ozone.unep.org/en/treaties-and-decisions/montreal-protocol-substances-deplete-ozone-layer
Montreal Protocol - International Treaty
https://www.britannica.com/event/Montreal-Protocol
Montreal Protocol – Wikipedia
https://en.wikipedia.org/wiki/Montreal_Protocol#History