Maksym Borodin has spent much of the past decade battling for an improved quality of life in the Ukrainian city of Mariupol. Today, his city is fighting for its very survival. That progress now looks set to be lost amid the rubble of this city of more than 400,000 people, as Russian forces besiege it and satellite images show utter devastation. Before the Russian invasion, Borodin, an activist turned politician, was among those who felt that, however slowly, progress was being made on environmental and climate issues in Ukraine. But as the war enters its third week, the fighting is...