As Helen opened her Amazon parcel,

her stomach filled with butterflies, rapid air technology,

and a grill mode feature,

this air-fryer tickled Helen's taste buds for a price lower

than she'd ever imagined.

Five stars from Helen.

Find star-rated products at star prices.

Start your search on Amazon today.

The town of Peter Sam, Massachusetts, is leafy.

It's green. It is not the business capital of anything.

It's not a place anyone associates

with cutting-edge economic research.

But there is a research forest here,

where scientists study the economic dynamics

of forest ecosystems.

And at the edge of the forest,

there's a little greenhouse on a hill.

This is where I came to learn about the surprising economic actors

in a hidden economy that we are still just beginning to understand.

This economy is being reshaped by climate change,

and without it,

we might not even be alive.

...