On Monday 13th July, thirteen Plane Stupid activists staged a protest on London Heathrow’s northern runway. The message was simple: there is a choice between preventing climate change and building new runways – we cannot do both. Aviation is incredibly damaging to the climate and its unfettered growth will jeopardise the UK’s chance of meeting its ambitious and legally binding climate targets. The 2008 Climate Change Act stipulates that an emissions reduction of 80% from 1990 levels must be made by 2050. This will not be possible if airports are actively expanded. Together with many other groups, Plane Stupid has been part of the movement campaigning against the third runway at Heathrow since it was first proposed. We have prevented the third runway from being built before, and we will do it again. What is more, we will oppose the expansion of airports everywhere, not just at Heathrow. Put simply, we’re in it for the long haul. And finally: this is about the affluent frequent fliers who fly multiple times a year for short leisure trips. There is sufficient existing capacity to support business flights and family holidays; we just do not need another runway to facilitate the very wealthy jetting off every other weekend to holiday homes and on shopping trips. We have a choice to make, and we want to make sure that that choice is the right one.