ActNow is the UN campaign to inspire people to act for the Sustainable Development Goals (SDGs). In the lead up to the Summit of the Future, join the 1 Million Actions for our Common Future challenge to contribute to a more sustainable and peaceful world. Find new inspiring actions on the app and at un.org/actnow.
From science to global action: 40 years of the Vienna Convention
Forty years ago, nations adopted the Vienna Convention to safeguard the ozone layer, which shields life on Earth from harmful ultraviolet radiation. This landmark agreement laid the foundation for global efforts to protect both people and the planet. Building on it, the Montreal Protocol successfully phased out ozone-depleting substances, and the Kigali Amendment now targets greenhouse gases. On the International Day for the Preservation of the Ozone Layer (16 September), these treaties together demonstrate how science can drive global cooperation for a safer, healthier future.