50 years, 25 Cops: the slow-motion movement to save the planet

How Guardian journalists reported on the long, twisting road to global action on the climate crisis

From the earliest global environment conference in the 1970s, through the Rio Earth Summit and 25 subsequent Cops, Guardian journalists have reported on every twist and turn of these gargantuan gatherings, which have attracted hundreds of thousands of delegates over the years.

One of the success stories of the conference [is] the little blue and white bicycles parked outside the main buildings used by the UN delegates, UN staff and the press, who have particularly taken to them, sign out a key which fits a lock of any machine. By lunchtime yesterday every key was taken.