This is a list of notable events relating to the environment in 1977. They relate to environmental law, conservation, environmentalism and environmental issues.

Events

• The World Network of Biosphere Reserves was started.

September

• The Venpet-Venoil collision occurred in dense fog off the coast of South Africa. The Venoil ploughed into the Venpet, eventually leading to the spilling of approximately 26,600–30,500 tonnes of crude oil.

December

• The Reserves Act 1977 is passed in New Zealand.