Five decades ago in an opera house in Stockholm Sweden, world leaders opened discussions that would lead to the creation of the United Nations Environment Programme (UNEP). Since that meeting on 5 June 1972, UNEP has become the world's leading advocate for nature, using science, diplomacy and public outreach to counter a range of threats, from pollution to climate change. Here's a closer look at UNEP's work over the last 50 years and how it's helping to make the planet a more sustainable, equitable place.
