The best way you can advocate for climate action is to talk about climate science and the need for governments to cut carbon pollution. Talk about warmer temperatures, talk about extreme weather, talk about rising sea levels. Talk to your family, your neighbors, your elected officials.
David Roberts gave progressives a simple map for talking climate change and now Bill Nye and the Climate Reality Project are making it even simplerer with Climate 101:
You don't have to know all the answers to know we need to take climate action now. Don't be afraid to speak up.
If someone asks you something you don't know, tell them that's a good question and you want to find out the answer with them! The internet is never far away and it's loaded with really good climate answers.