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Climate researcher Luciana Gotti stares grimly out of an oval portal.

I'm sitting next to her in a single-engine prop plane.

We climb into the sky above the eastern Amazon in Brazil.

She motions toward the ground below us.

Luciana works at Brazil's National Institute for Space Research.

She started coming here two decades ago.

She says that back then the land we're looking down on was completely blanketed in green.

The crowns of millions of trees intertwined.

The few subsistence farms that interrupted this green ocean only seemed to prove how vast the

jungle was. Today all we see through the plane's window glass are brown and green jigsaw puzzle

pieces alternating between newly cleared jungle, grain crops, and the remains of recent harvests.

I'm Daniel Grossman reporting for science quickly.

I've come to the Amazon to find out what Luciana is learning about the health of the forest

and its role influencing the rate of climate change.

And the plane we're on isn't just used for taking in the view.

It's part of Luciana's science.

She hires this plane and others to collect air above the changing forest.

...