As the UK prepares to host COP26, Britons have cut back on fossil fuels... out of necessity. For weeks, they've been lining up at gas stations, sometimes fighting at the pump not because there's not enough fuel but rather due to a shortage of truck drivers to deliver it. Yet another unintended consequence of Brexit, which has caused many EU truckers to leave the UK and makes it harder for Great Britain to get fuel from mainland Europe.

Watch this episode of GZERO World with Ian Bremmer: Surviving a warming planet