and amphibians. 2021 The World Environment Day falls on June 5. The theme for 2021 is "Ecosystem Restoration", and was hosted by Pakistan. On this occasion UN Decade of Ecosystem Restoration was also launched. 2022 The World Environment Day theme for 2022 is "Only One Earth" and the event was hosted by Sweden. See also Arbor Day Earth Day National Cleanup Day World Cleanup Day Index of environmental articles List of environmental dates List of environmental protests United Nations Conference on the Human Environment References External links World Environment Day 2019 2008, 2009 World Environment Day 2018 Theme Environmental awareness days Global natural environment June observances Recurring events established in 1973 United Nations days