The graph shows how the concentration of carbon dioxide in the atmosphere has changed since ... The graph below shows the global average surface temperature since 1900. What was the global average ...

Charles David Keeling first documented how the gas buildup in the atmosphere contributes to the warming planet. His son says proposed cuts to NOAA threaten critical scientific research.

The graph shows how the concentration of carbon dioxide in the atmosphere has changed since ... The graph below shows the global average surface temperature since 1900. What was the global average ...