This was a year of tug-of-war for the environment. With Donald Trump becoming president of the U.S. at a time when wildfires, hurricanes, and floods were devastating the country, it was challenging for scientists, activists and concerned citizens to get their voices heard. But several stood out as global leaders on climate and helped give rise to those who were silenced. Below are 14 of the most notable influencers of 2017 and how they fought for a cleaner, safer environment for all.