Often times when you face such an overwhelming challenge as global climate change, it can be somewhat daunting - it's kind of like trying to lose weight, which I know something about.

The evidence for human-made climate change is overwhelming.

There's no longer any serious doubt that climate change is real,accelerating and caused by human activities. We are uncertain about how deep and time of arrival of the consequences, but we are quite clear that they will not be good.

There's no longer any serious doubt that climate change is real, accelerating, and caused by human activities.

I believe climate change is real and that we can save our planet while creating millions of good-paying clean energy jobs.

You will not solve global climate change by hitting the delete button.