More than 50 activists blocked the runway of London's Stansted Airport Monday morning to protest against the creation greenhouse gases by planes, dpa reported.
Plane Stupid, a climate action group, said on its website that about 50 if its members shut down the airport by camping on the runway and surrounding themselves with security fencing.
"We're here because our parents' generation has failed us and its now down to young people to stop climate change by whatever peaceful means we have left," one group member, whose name was given as Lily, said in a statement posted on the internet.
The runway had been closed for maintenance and was scheduled to reopen at 0500 GMT.
The group plans to maintain the blockage as long as possible to prevent the emission of greenhouse gases, Plane Stupid said.
Police arrested four of the protestors, the BBC reported.
Stansted, an airport about 50 kilometres north-east of London, is a hub for many European budget airlines.