The UN heads of state and government meet annually for the World Climate Conference and demonstrate, as clearly as in a prayer wheel-like manner, that a global phenomenon can only be countered globally. And yet it took global student protests to reintroduce ecology as a political issue. And just as immediately they called on climate deniers and all those who relativize the urgency of climate change in day-to-day political business. But even the climate-conscious spectrum is by no means ideologically closed. Environmental protection and climate justice, green growth and socio-ecological...