This booklet presents an overview of the UN Environment Programme (UNEP) – its mission, vision, strategy and action for tackling the triple planetary crisis. It chronicles environmental highlights from the past five decades, shows how UNEP works in partnerships, and explains why it is crucial that funding provided to UNEP keeps pace with the growing expectations placed on the organization to deliver results in support of people and planet. It also gives evidence of UNEP being a trusted and relevant partner on the journey towards planetary sustainability.