Mark Maslin

But they have an effect of a year.

So the huge volcanoes exploding has an effect for one year.

And what we have to do, if we were going to go down this route, is do this exploding volcano everywhere at the same time every single year.

The other problem that we have is this changing of the reflectance.

We're not sure if we do it in one area, perhaps we do it over Europe.

What's the effect on the other parts of the world?

Do we shift weather patterns?

So the problem here is there's a real ethical problem, which is you may have dimmed

the sunlight for your area and a little bit effect on the globe, but you've suddenly shifted the monsoons by 500 miles.

So a country doesn't get any rainfall and another country gets too much rainfall.

So there's a real ethical dimension to this sort of like manipulation of the planet.

So I think it is beholden on scientists of all countries to look into these problems and potential solutions.

So, of course, we should be doing the model ones.

We should be looking at small scale experiments to see if it's even feasible, because at the moment,

This is all very theoretical.

We need to know whether it is even possible.

If it's possible, what are the consequences?

What are the side effects?

And therefore, we can then openly discuss, is this necessary?

Is this something we need to discuss?