Carbon dioxide Quote by Physicist Freeman Dyson

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

There is no doubt there is more carbon dioxide in the atmosphere, caused by the burning of fossil fuels. It should have an effect…

— John Christy

... The reality is that atmospheric CO2 has a minimal impact on greenhouse gases and world temperature. Water vapor is responsible for 95 percent…

— Walter Cunningham

We have known since the 1800s that carbon dioxide traps heat in the atmosphere. The right amount keeps the climate conducive to human life.

— James Hansen

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

— Alan Carlin

My first inclination is to be a bit skeptical about the claims that human-produced carbon dioxide is the direct contributor to global warming.

— Buzz Aldrin

There is no proof that carbon dioxide is causing or precedes global warming....All indications are that the minor warming cycle finished in 2001 and…

— John Williams

Global warming is a scientific fact as much as the hole in the ozone layer or Earth's orbit around the sun.

— Johan Rockstrom

Each year we pump at least six billion tons of heat-trapping carbon into the innermost layer of our atmosphere, whose outer extent is only…

— Ross Gelbspan

The models that have been constructed agree that when, as has been predicted, the level of carbon dioxide or its equivalent in other greenhouse…

— Bill McKibben

The truth is, as most of us know, that global warming is real and humans are major contributors, mainly because we wastefully burn fossil…

— David Suzuki

... those who are absolutely certain that the rise in temperatures is due solely to carbon dioxide have no scientific justification. It's pure guesswork.

— Henrik Svensmark