Mark Maslin

Is this something we need to agree internationally?

And what are the ethical considerations?

But of course, the underlying science has to be there so people can choose.

Oh, so Tom, I would slightly disagree because a couple of weeks ago, scientists retired the RCP 8.5.

So 15 years ago, we had stories or scenarios about emissions into the future.

One of them was, hey, we're going to do everything we can.

We'll keep it to 1.5.

Brilliant.

And then there was one that said, look, China and India and other developing countries are using a lot of coal.

This could double or triple into the future.

We had that scenario, the RCP 8.5.

What we did last year was have a workshop where everybody sat down from the experts around the world and went, do you know what?

This is now so unlikely we can retire it.

And that meant that the 4 to 6 degrees warming that I was talking about and you were talking about, say, 10 years ago, is off the cards.

However, we're now still looking at 3 degrees warming, which is a lot hotter than we have today.

But...

The international negotiations, the global economy, the huge price drop in renewables is already having effect.

The problem is, as you and I know, we need to do all of this faster, five times faster if we are going to have any hope of keeping to 1.5.

oh, I'm going to go and stand by the air conditioning now because it is way too hot, Tom.

Hey, but at least I can show that during London Climate Action Week, climate change is actually happening.