There has been a close correlation between changes in global temperature and the rise of carbon dioxide in the atmosphere during the last 170 years.
To limit global warming this century, we need to limit CO₂ emissions.
An animated history of temperature vs. carbon dioxide.
To limit global warming this century, we need to limit CO₂ emissions.
An animated history of temperature vs. carbon dioxide.
Static plot showing the correlation between global mean temperature and carbon dioxide concentration in the atmosphere over the last 170 years. 
Final frame of the animation. If carbon dioxide concentrations keep rising at historical rates, global warming could more than triple this century.
We need to limit carbon dioxide to limit global warming. Even so, some further warming is already unavoidable.
We need to limit carbon dioxide to limit global warming. Even so, some further warming is already unavoidable.
