Professor allegedly sheds light for climate change sceptics | The Australian

According to Professor Geller, sceptics are incorrect when they claim CO2 cannot cause warming as it comprises only a small, though increasing, fraction of the atmosphere.

In fact, CO2 is highly reactive in the atmosphere, he said. "Just because it's a small fraction doesn't mean it's unimportant. If you don't believe me, try surviving in a room with a small concentration of cyanide gas."