1999 in the environment

This is a list of notable events relating to the environment in 1999. They relate to environmental law, conservation, environmentalism and environmental issues.

• The GEO-2000 is published. It is part of the Global Environment Outlook project.
• The Dioxin Affair, primarily a political crisis, occurred in Belgium during the spring of 1999 due to contamination of feedstock with polychlorinated biphenyls (PCBs). It was detected in animal food products, mainly eggs and chickens.

• The Environment Protection and Biodiversity Conservation Act 1999 is passed in Australia. It provides a framework for protection of the Australian environment, including its biodiversity and its natural and culturally significant places.
• The Memorandum of Understanding concerning Conservation Measures for Marine Turtles of the Atlantic Coast of Africa comes into force.

• The MV Erika sank off the coast of France creating a major oil spill.

• Human impact on the environment