This is by far the most serious crisis civilisation has ever faced.

We have to use our reasoning capacity and set long-term goals based on our deepest values.

The truth is that we're at a critical juncture in the history of our species and if we don't act soon, we could inhabit a world we don't recognize anymore. But the most important truth is that we are capable of stopping climate change before the worst of its consequences are locked in. The solutions exist - all we need is the will to do something about it.

I wrote newspaper articles professionally for seven years, and I love newspapers. I'm hopeful that new business models will emerge that allow the newspaper culture to genuinely thrive in the digital age.

You see that pale, blue dot? That's us. Everything that has ever happened in all of human history, has happened on that pixel. All the triumphs and all the tragedies, all the wars all the famines, all the major advances... it's our only home. And that is what is at stake, our ability to live on planet Earth, to have a future as a civilization. I believe this is a moral issue, it is your time to seize this issue, it is our time to rise again to secure our future.

There are many who would much prefer that the word 'climate' never be mentioned and that the issue be eliminated from our national conversation.

You need to really scrub your investment portfolios, because I guarantee you, many of you are going to find them chock-full of subprime carbon assets.