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Carbon Dioxide

NASA (.gov)
Graphs and an animated time series showing atmospheric carbon dioxide levels from the last three glacial cycles to present day.
6 months ago

Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases | US EPA

U.S. Environmental Protection Agency (.gov)
This indicator describes how the levels of major greenhouse gases in the atmosphere have changed over time. graph figure Figure 1.
3 months ago

A New 66 Million-Year History of Carbon Dioxide Offers Little Comfort for Today

State of the Planet
A massive new review of ancient atmospheric carbon-dioxide levels and corresponding temperatures lays out a daunting picture of where the...
9 months ago

7. Is the current level of atmospheric CO2 concentration unprecedented in Earth¡¦s history? Answer

Royal Society
The present level of atmospheric CO2 concentration is almost certainly unprecedented in the past million years, during which time modern humans evolved and...
7 months ago

Geoscientists map changes in atmospheric CO2 over past 66 million years

The University of Utah
This graphic indicates Earth's atmospheric concentrations of CO2, expressed in parts per million (ppm), throughout the Cenozoic era from pre-industrial times...
9 months ago

The Keeling Curve

National Geographic Society
The Keeling Curve is a graph that shows the ongoing change in the concentration of carbon dioxide in Earth's atmosphere.
3 months ago

Evidence

NASA Science (.gov)
Takeaways The rate of change since the mid-20th century is unprecedented over millennia. Earth's climate has changed throughout history.
6 months ago

A New 66 Million-Year History of Carbon Dioxide Offers Little Comfort for Today

Jackson School of Geosciences
A massive new reassessment of ancient atmospheric carbon dioxide (CO2) levels and corresponding temperatures lays out a daunting picture of...
9 months ago

Causes of Climate Change | US EPA

U.S. Environmental Protection Agency (.gov)
Human activities have released large amounts of carbon dioxide and other greenhouse gases into the atmosphere, which has changed the earth's climate.
5 months ago

Chart of historical carbon dioxide levels misleadingly shared by climate change sceptics

AFP Fact Check
A graph showing historical carbon dioxide concentrations on Earth made by a climate change sceptic lobby group has been shared hundreds of...
10 months ago