What changed in the United States with Hurricane Katrina was a feeling that we have entered a period of consequences.

The truth about the climate crisis is still inconvenient for the large carbon polluters and the politicians who are in their pockets.

The climate crisis is not a political issue; it is a moral and spiritual challenge to all of humanity. It is also our greatest opportunity to lift global consciousness to a higher level.

I pledge to you today that as president, in my first budget, I will introduce the largest increase in special education ever.

It's an important point, and every little bit helps not least because those who make those kinds of changes are more likely to make their voices heard as citizens. But the ultimate solutions are going to come through policies.

The choice to 'do nothing' in response to the mounting evidence is actually a choice to continue and even accelerate the reckless environmental destruction that is creating the catastrophe at hand.

It's as if we think the laws of physics are subject to debate and amendment and political contributions can sway the laws of physics.