How would a Brexit affect the environment?

The environment has not played a prominent role in the UK’s EU referendum campaign. And yet the EU has been highly active in global efforts to tackle climate change and, as Sebastian Oberthür writes, environmental issues are a key area that could be affected by a Brexit. He argues that the EU’s attempts to improve the environment are far from perfect, but the ability of European states to work together in securing international agreements has had a notably positive impact not just on Europe, but on the wider world.