Our energy sources are not sustainable.

For me, what's important.

So what needs to be done?

There's two great forces that are both volitional but inevitable.

Climate change is real.

And, of course, Arctic communities are toast.

We have now, and are the first generation with, the power to do this.

75 minutes.

In the U.K., the Thames Barrier protects London from storm surge.

Okay? We cannot reduce animal numbers to rest it more without causing desertification and climate change.

Don't we already know how they affect temperatures?

less stuff.

You know, this is really an infinite thing.

We're not even slowing down.

And the same thing is true for people who are in absolute crisis. Right?

It may surprise you that it's not only climate.

We, the people, still believe that our obligations as Americans are not just to ourselves, but to all posterity.

They've got no points of land more than about six feet above sea level.

And he used to be the USA Today Monday morning guy.

And I'll mention them the emission of CO2, climate change, the fact that we have the responsibility of the acceleration of the climate change.

As we see the spread of it, we see national hubs emerging.

And we know the solar output's not constant through time.

And more CO2 causes more warming.

They are both two branches of the same field of atmospheric science.

So, we're not sure where this story is going to end, whether it's got a happy or sad ending.

And I think it really summarizes where we are here.

So those are all natural causes of climate change.

You know the climate.

The game retreated northward

That is the change needed to restore energy balance and prevent further warming.

I traveled to a place called WAlS Divide, about 600 miles from the South Pole.

And even at that time, with the introduction of agriculture, 8,000, 10,000 years ago we started to see climate change.

What's new is just the degree of it.

I'm just going to talk about two things.

We see and feel the climate changes, the droughts and the flooding, the storms and the heat.

The climate is changing.

I can't think of anything else that's happened in my lifetime that way.

And there's no adaption.

We're running out of land.

When I realized that climate change was real, and it was not based on computer models,

Here's another one completely different one

The climate is changing.

Now plants are under threat.

Number two, very quickly

Do we have evidence of this? Yes, coral reef systems.