Although four climate change cases have been filed in US courts, and all have failed, one of them got a ruling in the Supreme Court which opens up the route to other cases. That case - American Electric Power Company v Connecticut - opened the possibility that the courts, not just the US Environmental Protection Agency, could regulate greenhouse gas emission levels.

Keep filing

Matt Pawa, a lawyer in that case, said: ‘Tobacco litigation took 30 years or more before the courts were ready and before the correct legal theories were there to make it all work. We gotta keep filing case after case before we get it right.’ Source: Vice News