Over the last few years it feels like young people have taken over the climate movement. They’re out striking, suing national governments, occupying congressional offices, and taking to the streets. And according to polls, they care more, with 70% of young adults saying they worry about global warming compared to 56% of people over 55. But of course - climate action isn’t new - people have been marching, protesting, and demanding change since the 60s and 70s. People who were grandparents today were fighting for the climate when they were young people, and many are still at it today. It made us wonder: What’s changed since the early days of the environmental movement? How are the stakes different today? And what’s the best way to speak up about climate change?