I do not believe we can effectively move Australia to a lower emission economy, which is what we need to do if we're going to make a contribution to a global reduction in greenhouse gases, without putting a price on carbon.

There's no shortage of Democrats who are at least as committed as Schwarzenegger to reducing greenhouse gases.

You could warm Mars up, over time, with greenhouse gases.

Sending a container from Shanghai to Le Havre emits fewer greenhouse gases than the truck that takes the container on to Lyon.

Even if we were to stop putting out greenhouse gases right now, we'd still face decades of warming.

There is universal consensus among experts that the earth's atmosphere is heating up - and that we are responsible for it by putting carbon dioxide in the atmosphere. We also know that the consequences of global warming are catastrophic. But how do we make sure that all countries reduce greenhouse gases?