As global warming and climate change continues to be an important issue and an increasingly prevalent part of the American conversation, here’s a look at some of its main activists.



In Hollywood


In HollywoodWhile there are too many Hollywood stars to name that are devoted to this issue, one stands above the rest because of his recent Oscar win as best actor. Leonardo Di Caprio has been acting for decades and finally won the grand prize this year. But he devoted almost all of his acceptance speech (broadcasted to the masses) to a message about climate change: “Climate change is real, 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.” Watch the whole speech in the clip below.



In Washington, DC


In Washington DCSen. Bernie Sanders shares Leonardo’s view. Of the 2016 presidential candidates, he is by far the most dedicated to this issue, calling climate change “the single greatest threat facing our planet.” His solution? To invest in clean energy and create millions of jobs. In contrast, Donald Trump tweeted in 2012: “The concept of global warming was created by and for the Chinese in order to make U.S. manufacturing non-competitive.” Here’s a recent NBC News story that gives an overview about how all of the presidential candidates feel about global warming and climate change.



Around the World


Around the WorldOne of the leading organizations that’s fighting climate change is, with an emphasis on uniting activists from around the world and implementing grass roots initiatives. One of its biggest fights in the U.S. was against the Keystone XL pipeline. According to Moyers & Company, was named for “what climate scientists say is the safe concentration of carbon dioxide in the atmosphere — 350 parts per million (ppm). (We’ve now passed 400 ppm.)”


If you want to join the fight, here are some simple things you can do from the United States Environmental Protection Agency.