World Environment Day is the biggest international day for the environment. Led by the United Nations Environment Programme (UNEP), and held annually since 1973, it has grown to be the largest global platform for environmental outreach. It is celebrated by millions of people across the world.

World Environment Day in 2025 will focus on ending plastic pollution. The Republic of Korea will host the global celebrations.

About the 2025 theme

Plastic pollution exacerbates the deadly impacts of the triple planetary crisis: the crisis of climate change, the crisis of nature, land and biodiversity loss, and the crisis of pollution and waste. Globally, an estimated 11 million tonnes of plastic waste leak into aquatic ecosystems each year, while microplastics accumulate in the soil from sewage and landfills, due to the use of plastics in agricultural products.