Leonardo DiCaprio has long had a passion for getting peeps educated on the dire reality of climate change. Even way back in 2007 (i.e. the year of things like Plain White T's and Spider-Man 3), dude was getting the message out with expansive documentaries like The 11th Hour. A lot has happened since then, such as DiCaprio finally nabbing an Oscar and, yes, the continued destruction of our planet. To get everyone caught up, DiCaprio is back at it with Before the Flood.

The documentary, a collaboration with director Fisher Stevens, gave concerned viewers an early peek via Entertainment Weekly Thursday. "This clip is from 2015, when Leo and I spent the Fourth of July on Baffin Island in the Canadian Arctic," Stevens told EW. "We visited National Geographic explorer Enric Sala who was doing a study on how much sea ice has melted in the Arctic—and we were shocked to hear that by 2040 there will be no sea ice left in the summer."

Before the Flood takes viewers through Canada, Indonesia, Miami, Beijing, and elsewhere across the world as DiCaprio and Stevens meet with a variety of climate scientists and related experts. President Barack Obama, an outspoken proponent of doing everything in our power to achieve a more green-friendly living environment for all, also makes an appearance.

The Brett Ratner-produced documentary will have its international premiere at this week's Toronto International Film Festival, with curator Thom Powers praising the film's accessible approach to its topic. "[DiCaprio's] passion and inquisitiveness radiate in his blunt talk and genuine curiosity," Powers said of the film. "He confesses to feelings of pessimism, but he receives motivating wisdom from luminaries including entrepreneur and inventor Elon Musk, meteorologist and astronaut Piers Sellers, activist and environmentalist Sunita Narain, and President of the United States Barack Obama."

Interested in learning more about DiCaprio's climate change initiatives? Peep this. Then catch Before the Flood in select theaters Oct. 21 and all across the planet via the National Geographic Channel starting Oct. 30.