Activity Quote by Robert Jastrow

There are a number of causes of climatic change, and until all causes other than carbon dioxide increase are ruled out, we cannot attribute…

— Reid Bryson

The Earth is warming but physical evidence from around the world tells us that human-emitted carbon dioxide has played only a minor role in…

— Fred Singer

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

— Piers Corbyn

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

... 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

There is no strong evidence to prove significant human influence on climate on a global basis. The global cooling trend from 1940 to 1970…

— Peter Stilbs

Geologists and paleo-climatologists know that in the past the Earth's temperature has been substantially warmer than it is today, and that this warming has…

— Greg Benson

Based on the laws of physics, the effect on temperature of man's contribution to atmospheric CO2 levels is minuscule and indiscernible from the natural…

— Robert L Scotto

...it is quite obvious that the temperature change during the last 100 years or so includes significant natural changes, both the linear change and…

— Syun-Ichi Akasofu

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

The concentration of atmospheric carbon dioxide has changed greatly since fossilized life began on Earth nearly 600 million years ago. In fact, there is…

— Greg Benson

Without a doubt, the warming of the past 100 years has been a welcome respite from a long and deadly Little Ice Age. The…

— James Taylor