Air Quote by Syun-Ichi Akasofu

The atmospheric CO2 concentration is rising - mainly due to the burning of fossil fuels. It's agreed that this build-up will, in itself, induce…

— Martin Rees

Clearly the climate is changing, whether caused by CO2 emissions or some other cause.

— Paul Craig Roberts

It seems that, notwithstanding the dramatic increases in manmade CO2 emissions over the last decade, the world's warming has stopped.

— Tony Abbott

... For nearly a decade now, there has been no global warming. Even though atmospheric CO2 has continued to accumulate - up about 4…

— Walter Cunningham

“CO2 had increased due to human activities, CO2 will continue to increase unless changes are made, and these increases will affect weather, agriculture, and…

— Naomi Oreskes

“Why have global temperatures not risen in the best part of two decades while CO2 levels have kept on rising? •    ”

— Alan Carlin

The warming we've experienced in the late 20th century could just as easily be explained by small decreases in cloud cover - natural changes…

— Willie Soon

Are global temperatures rising? Surely, they were rising from the late 1970s to 1998, but 'there has been no net global warming since 1998.'…

— John R. Lott Jr

The general trend in the last 4,000 years is that carbon dioxide and temperature have been moving against each other.

— Piers Corbyn

It's likely that CO2 has some warming effect, but real proof of that hypothesis is tricky. You have to confirm by observation exactly how…

— Nigel Calder

Few scientists now dispute that today's soaring levels of carbon dioxide and other gases in the atmosphere will cause global temperature averages to rise…

— Carl Sagan

Concentration of greenhouse gases, especially CO2, have increased substantially since the beginning of the industrial revolution. And the National Academy of Sciences indicates that…

— George W. Bush