This is on point. I'm Begna Chakrabardi. The great Boriel forests of the planetary north

form an almost unbroken ring at the top of the planet Earth's deep green crown at the

edge of the white Arctic North. Ben Rollins has visited these forests on foot by canoe

and under the perpetual sunless indigo sky of what are supposed to be cold snowbound

winters. And here is what he has found.

Quote, this bright green halo is moving unnaturally fast, crowning the planet with a loral

of needles and leaves, turning the white Arctic green, he writes. The migration of the treeline

north is no longer a matter of inches per century. Instead, it is hundreds of feet every year.

The trees are on the move and they shouldn't be.

That is from Ben Rollins's new book. It's called The Tree Line, the last forest and the

future of life on Earth. And Rollins joins us from Gloucester, England. Ben Rollins,

welcome to on point.

Hello, thanks for having me.

I first of all wonder if you could help engage all our senses, our eyes, our ears, our

our sense of smell even touch. And just describe to me, for example, the the forest of Alaska

that you visited, what's it like being in the spruce forest is of Alaska?

So in North America, let me tell you about just across the border in Canada with the

Anishanabi people in the forests of Pima Chawana Ki and those old growth forests that have

been there ever since the retreat of the last ice sheet at the end of the last ice

eight have succeeded and grown and followed their own algorithm over thousands of years.

And walking through, I felt a bit like I was underwater. There are these huge springy broccoli

heads of lycan almost up to your knees and it feels like you're walking on a sponge.

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