Reducing carbon footprint. What can we do?
http://www.countdownyourcarbon.org/our-assumptions.html
CO2 emissions by country
https://www.ucsusa.org/resources/each-countrys-share-co2-emissions
CO2 emissions in the U.S> by state
https://en.wikipedia.org/wiki/List_of_U.S._states_and_territories_by_carbon_dioxide_emissions
Controlling Greenhouse gas emissions in transportation
https://www.epa.gov/ghgemissions/sources-greenhouse-gas-emissions#transportation
Overview of Greenhouse Gases
https://www.epa.gov/ghgemissions/overview-greenhouse-gases
Nasa Space Math
https://spaceplace.nasa.gov/
Connecticut Department of Environmental Protection: Global Warming Tools https://portal.ct.gov/DEEP/Climate-Change/Climate-Change
