This 16 April 2019 video from the USA by independent senator and Democratic party presidential candidate Bernie Sanders says about itself:
The U.S. Government Knew About Climate Change Up To 5 Decades Ago
I am so incredibly proud of the youth fighting against climate change. Our climate struggle would not have progressed as much as it has without their momentum and support. I thank them for their relentless work in the fight for a cleaner, safer world.