Climate change is one of the most, if not the most, pressing issue of our times. We all know it. That’s why some celebrities are using their platforms to advocate for change now. Here are just a few. For decades, Leonardo DiCaprio has been putting his money where his mouth is in regards to climate change. Seriously, he launched his eponymous foundation (now part of Earth Alliance), dedicated to improving the health and wellbeing of the planet, back in 1998. The actor has also produced a number of environmental docs and has sat on boards for organizations like the World Wildlife Fund. He even used his 2016 Oscar speech to shine a spotlight on the issue. “Climate change is real,” he said. “It is happening right now, it is the most urgent threat facing our entire species and we need to work collectively together and stop procrastinating.”