Congratulations to the winners of the 2015 Goldman Prize.

It's the biggest prize an environmental activist can get, and this is the award ceremony.

Thousands of people are packed into San Francisco's Grand Opera House, and in the middle of the front row, tonight's big winner is waiting for her name to be called.

Berta Casares from Honduras.

It's April, 2015, and Berta Casares is being honored for her fight against a proposed hydroelectric dam in western Honduras.

Foreign investors, the Honduran government, and some of the wealthiest business leaders in the country have backed the project.

Bertha's worked with a native community known as the Lenka to oppose it.

They've filed legal complaints, arguing the dam will destroy their way of life.

They've stacked logs and stones on roads, blocking construction equipment from reaching the work site.

And Bertha has been credited with driving the world's largest hydroelectric

contractor, China's Sino Hydro Corporation, to pull out of the project. It's been a grisly battle.

Protesters and security guards have clashed. A couple people have been killed. A few more have been wounded and scarred.

Berta herself says she's been constantly harassed.

Threatening text messages have popped up on her phone.

Strangers have followed her.

Mysterious vehicles have tried to drive her off the road.

But on this night, as she walks onto the Opera House stage,

none of that seems to rattle her.

She unfolds her speech at the podium and adjust the mic.

Her closest friends have never seen her like this.

The Bertha they know wears jeans and t-shirts.

Tonight, she's wearing a sparkling, pale rose gown.

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