In the past few years labor has grown significantly more active on the climate crisis and the fight against “extreme energy.” Side by side, union members and climate activists have won key victories against pipelines, coal and gas export terminals, and fracking. But at the international level, the 2015 Paris Climate Agreement locked in more emissions and temperature increases, which have catastrophic implications. What are union activists doing to build a sustainable world, and how can rising union activism connect with the global struggle?