Humanity dumped 37 billion tons of CO2 into the atmosphere in 2020 | Mashable
Climate Change Indicators: U.S. Greenhouse Gas Emissions | US EPA
The U.S. Is the Biggest Carbon Polluter in History. It Just Walked Away From the Paris Climate Deal. - The New York Times
Our carbon footprint: How do paper products fit in? - Two Sides North America
Annual CO2 emissions worldwide 1940-2020 | Statista
Offset 10 Metric Tons — paleBLUEdot llc
Carbon dioxide - Ballotpedia
Carbon dioxide peaks near 420 parts per million at Mauna Loa observatory - Welcome to NOAA Research
Co2 Emissions of the United States | 8 Billion Trees
U.S. Energy Information Administration - EIA - Independent Statistics and Analysis
Carbon Footprint Factsheet | Center for Sustainable Systems
Carbon dioxide in Earth's atmosphere - Wikipedia
Chapter 14 Flashcards | Quizlet
What is a ton of CO2, and how much do we emit? - the Tapio blog
Solved to be 100 years old, how many metric tonnes of CO2 | Chegg.com
Doha infographic gets the numbers wrong, underestimates human emissions - Carbon Brief
California wildfires emitted a huge amount of carbon dioxide this year. How much of a problem is that?
1 Tonne of CO2: What Does it Look Like? | Crown Oil
What is a "ton" of carbon dioxide anyway? | A New Shade of Green | Sherry Listgarten | Palo Alto Online
The Cost of Energy, Environmental Impact — The National Academies
Sources of Greenhouse Gas Emissions | US EPA
Climate Change Indicators: U.S. Greenhouse Gas Emissions | US EPA
Greenhouse gas emissions - Our World in Data
How Much Carbon Dioxide Are We Emitting? – Climate Change: Vital Signs of the Planet
