Climate change is analogous to Lincoln and slavery or Churchill and Nazism: it's not the kind of thing where you can compromise.

The evidence for human-made climate change is overwhelming.

These species lose their last options if we allow climate change to continue unchecked. Keeping the natural wealth of this planet means we must avoid dangerous climate change ? and that means we have got to reduce carbon dioxide emissions.

The measurements show long-term trends. Glaciers react to climate change, and warmer temperatures in the Alps are reflected in the results.

If we let climate change run its course, this could be a fairly typical winter 30 or 40 years from now.

We're vulnerable to begin with, and climate change exacerbates the vulnerability.