United Nations Environment Programme

"The United Nations Environment Programme (UNEP), established in 1972, works to encourage sustainable development through sound environmental practices everywhere. Its activities cover (...) the promotion of environmental science and information, to an early warning and emergency response capacity to deal with environmental disasters and emergencies."

See also UNEP.Net , which "delivers authoritative environmental information from a broad range of information and data providers (...)".

Source: UNEP website 

Deutsch: Umweltprogramm der Vereinten Nationen
Español: Programa de las Naciones Unidas para el Medio Ambiente
Français: Programme des Nations Unies pour l'Environnement
Nederlands: United Nations Environment Programme

Marine Litter

Bee losses

Ozone layer depletion