Fiona Harvey

It's from the encroachment of people onto areas that were previously wild.

So these threats are multiplying.

We know that these systems are in danger.

And the problem is when they collapse...

It's not just the wildlife or the trees and the forests and the natural systems that suffer.

It's people too, because this has a knock-on effect on food production.

It can have a knock-on effect on weather.

It can have a knock-on effect on soil fertility.

There's all kinds of ways in which the collapse of these ecosystems has an impact on human society that we cannot ignore.

And even systems on the far side of the world have an impact on the UK.

We live in such a globalized society.

The UK is not by any means self-sufficient in food.

We import a large slice of all of the food that we eat.

And if we can't rely on food supplies from abroad, then we're going to be in trouble.

And they look at these things from a national security lens.

They looked at, for instance, the potential not just for things to happen to the food chain, food supplies in the UK, obviously that's crucial, but also things that could happen overseas that will have an impact on us because, you know, there could be migration from areas that are affected.

Because, look, if you're living in an area where the ecosystem is collapsing around you, you don't just stay there and wait to die.

You know, you move.

You try to find ways to feed your family, to save their lives.

And that can involve moving.