Leonardo DiCaprio has urged people to "work collectively together" as we have a "nine-year window" in the race against time to combat climate change.
The Oscar-winning actor, 47, stressed the lack of time we have to fix the ongoing issue climate change presents us with, outlining some of the impacts that the planet will face if we let temperatures increase beyond 1.5 degrees Celcius (34 degrees Fahrenheit).
As well as warming and acidification of the oceans, DiCaprio - who is a United Nations climate ambassador and philanthropist who has spent tens of millions of dollars on environmental protections - said our planet is at risk of major damage.
"I’ve had two great passions in my life. That has been acting, and the protection of the natural world and getting the message out about the climate crisis," he told Deadline.
"I think there's a worldwide sense of anxiety about the fact that the powers that be, the private sector, governments, are not making the transition fast enough. We literally have a nine-year window.
"The main thing that it boils down to is, if you’re an individual, you, A, have to get involved. You have to vote for people that care about this issue and take science seriously."
He went on: "And we should not have any elected leaders, on a state level, on a city level, or a national level that don't listen to science, especially in this country."
"By population, we are per capita the largest polluters in the world, and even scientists have been saying this for decades now. We need to set an example for the rest of the world to follow. We’re an incredibly rich nation and we need to make this transition," he added.
Speaking about the temperature threshold, the Titanic continued: "If we reach this 1.5-degree (Celcius) threshold, where we hit that certain point in nature, there are all kinds of lightning-rod points with methane and the tundra and warming of our oceans, the acidification of our oceans.
"Most of the carbon that we've emitted to the atmosphere now has been absorbed by the oceans. We're not even feeling the real impact of climate change yet and our oceans are now warming at record levels.
"Each year is getting hotter than the next, and that doesn't stop. We're not going to see that stop. So, to mitigate the climate crises, I mean, it is, Don't Look Up."
"When we reach a threshold where the thawing of the ice and the tundra and Greenland and the arctic starts to release even more carbon…we’re already seeing it happen," he added.