New York City mayor and presidential candidate Bill de Blasio warned the United States only has 10 years to save the planet from the deadly effects of climate change.

Showing his support for the upcoming climate strike, de Blasio said, “We have ten years to save the planet. TEN YEARS. Today’s leaders are making decisions for our environment that our kids will have to live with. New York City stands with our young people. They’re our conscience. We support the 9/20 #ClimateStrike.”