The carbon dioxide concentration in the atmosphere is…

Washington bureaucrats have classified the very air we exhale as a pollutant and have gone unchallenged in this incredible assertion. The logical consequence is…

— Ron Paul

Senator Hillary Clinton is attacking President Bush for breaking his campaign promise to cut carbon dioxide emissions, saying a promise made, a promise broken.…

— Craig Kilborn

It's not the case that carbon dioxide drives temperatures. When you leave Ice Ages, it's the other way around: The temperatures go up first,…

— Piers Corbyn

I am hoping that the scientists and politicians who have been blindly demonizing carbon dioxide for 37 years will one day open their eyes…

— Freeman Dyson

It’s time to move the debate past the dogmatic view that carbon dioxide is evil and toward a world view that accepts the need…

— Robert Bryce

Carbon dioxide pollution is transforming the chemistry of the ocean, rapidly making the water more acidic. In decades, rising ocean acidity may challenge life…

— Sigourney Weaver

Plate tectonics is not all havoc and destruction. The slow movement of continents and ocean floors recycles carbon dioxide dissolved in the oceans back…

— Seth Shostak

Now, we put out a lot of carbon dioxide every year, over 26 billion tons. For each American, it's about 20 tons. For people…

— Bill Gates

Centuries-old habitats such as coral gardens are destroyed in an instant by bottom trawls, pulverized by weighted nets into barren plains. And global carbon…

— Ted Danson

I know that nuclear is better than fossil fuels when it comes to carbon dioxide, but nuclear energy is by no means clean. We…

— Sheryl Crow

If food was no longer obliged to make intercontinental journeys, but stayed part of a system in which it can be consumed over short…

— Carlo Petrini

[The doctrine of air] I was led into in consequence of inhabiting a house adjoining to a public brewery, where I at first amused…

— Joseph Priestley

As we pump greenhouse gases into our atmosphere, the ocean absorbs carbon dioxide, making the seawater acidic and hostile for shellfish and corals.

— Barry Gardiner

Whether carbon dioxide is quite the environmental villain that some people make it out to be is not yet proven.

— Tony Abbott

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