On the occasion of the Third United Nations Environment Assembly, whose overarching theme was “Towards a Pollution-Free Planet”, the UN Environment Programme decided to lead by example and show how environmental sustainability can be integrated into large events and become standard practices for future meetings. Therefore, the UN Environment Programme expressed its commitment to continue to make the Third United Nations Environment Assembly a sustainable, climate neutral, paper smart, and plastic less event, as it was previously done for the Second United Nations Environment Assembly in 2016. The event hosted 3,889 participants from all around the world took place at UN Environment Programme’s Headquarters in Nairobi in December 2017.