We face the gravest threat that civilization has ever…

We are still learning how exactly the Earth reacts to increased CO2 and other greenhouse gases. We know it leads to warming seas which…

— Graciela Chichilnisky

We face a climate crisis now that is the most serious challenge our civilization has ever confronted. And the greatest country in the world…

— Al Gore

There is not going to be, we can be quite certain, there's not going to be any action on reducing greenhouse gas emissions by…

— Ross Garnaut

It's important to see things in perspective. Automobile traffic is responsible for only 12 percent of total CO2 emissions. One should be able to…

— Martin Winterkorn

The European Union and environmental advocacy groups use global warming hysteria to advance their own special agendas. The European Union recognizes any significant reduction…

— Jay H. Lehr

These proven positive consequences of elevated CO2 are infinitely more important than the unsubstantiated predictions of apocalypse that are hypothesized to result from global…

— Keith E. Idso

Naturally, we will continue to offer very powerful vehicles in the future. Nevertheless, no other manufacturer has reduced the CO2 emissions of its fleet…

— Norbert Reithofer

We can no longer completely avoid anthropogenic climate change. At best, limiting the temperature rise to two degrees is just about possible, according to…

— Hans von Storch

Even if you accept the theory of man-made climate change, wind turbines are a rotten way to reduce CO2 emissions, or to improve energy…

— Roger Helmer

I think any public policy that doesn't account for the fact that most CO2 emissions don't come from the United States, but they come…

— Todd Young

I think all countries need to aim to cut the CO2 emissions per person, taking account of externalities like imports and exports.

— Martin Rees

CO2 is a minor player in the total system, and human CO2 emissions are insignificant compared to total natural greenhouse gas emissions. Therefore, lowering…

— Jonathan Duhamel

To reduce modern climate change to one variable, CO2, or a small proportion of one variable - human-induced CO2 - is not science. To…

— Ian Plimer

By using vertical space more effectively, you not only make more room for greenery but shorter commutes also mean less pressure on CO2 emission…

— Minoru Mori

European carmakers pledged to reduce CO2 emissions by 25 percent from 1995 to 2008. We kept our word and reduced the value even more.…

— Norbert Reithofer