I Am Greta is an intimate chronicle of environmental activist Greta Thunberg's continuing struggle to raise awareness of climate change and spur the world to action.

By now, many of us are aware of climate change and the dire threat it poses to the future of our planet. But are any of us really acting like people trying to avert an imminent disaster?

This is the question that spurred Greta Thunberg, at the age of 15, to start protesting in front of the Swedish parliament building.

Since then, Greta has become the most recognizable face of climate activism, both praised as a determined fighter for the planet's future and denounced as a dangerous alarmist.

Filmmaker Nathan Grossman has previously worked on Swedish documentaries about politics, soccer, and the ethics of eating meat.

What began with Grossman filming Greta at the start of her protest turned into an intimate year-long chronicle of her rise to global prominence, its personal toll, and the continuing importance of her message.