Climate change is affecting biodiversity, altering marine, terrestrial, and freshwater ecosystems around the world. Conserving and restoring natural spaces, both on land and in the water, is essential to limit carbon emissions and adapt to the changing climate. Learn how the UN is tackling climate change and biodiversity together here.

The world’s roadways are clogged with vehicles, most of them burning diesel or gasoline. Walking or riding a bike instead of driving will reduce greenhouse gas emissions — and help your health and fitness. Everyone can help limit climate change.

With rising temperatures, collapsing ecosystems, and disruptive weather extremes, humanity stands at a tipping point. World Environment Day 2026 focuses on the urgency of climate action, underscoring the need to rethink the systems that power our economies and repair our relationship with the climate.