The Trump Administration's Environmental Protection Agency has removed its endangerment finding, effectively negating the scientific understanding that burning fossil fuels is harmful to human health and undermines the mechanism to limit emissions that are transforming earth systems. The author reflects on a period of climate change that includes the Arctic's warming four times faster than global average and the hottest winter on record in North America. He argues that a new generation of climate activists may be our last hope. Born in 1970, this year was a high point of hope for the planet when Senator Gaylord Nelson and Republican Senator Pete McCloskey launched the first Earth Day on April 22, 1970. Despite public interest in climate change waning due to climate fatigue and authoritarianism, climate change is not going away but will prove to be the story of the 21st century.