For twenty years, Oliver Ressler has been making videos on topics such as capitalism, democracy, racism, and ecology. Below, he discusses “Barricading the Ice Sheets,” curated by Corina L. Apostol at Tallinn Art Hall as part of the artist’s wider research project involving six exhibitions across Europe that focus on the climate movement. On view through November 6, the Tallinn show features the six-channel video installation Everything’s coming together while everything is falling apart, 2016–2020, which follows environmental activists as they plan and carry out blockades and demonstrations in