The Global Change Research Act of 1990 is passed in the United States. It is a law requiring research into global warming and related issues.
Project Crimson begins. It is a conservation initiative in New Zealand to promote the protection of the pōhutukawa and the rata that are under threat due to browsing by the introduced possum.
The Talloires Declaration, a declaration for sustainability, was created for and by presidents of institutions of higher learning, and pledges that they will be world leaders in developing, creating, supporting and maintaining sustainability.
The dusky seaside sparrow, found in southern Florida in the natural salt marshes of Merritt Island and along the St. Johns River, was officially declared extinct. The last definite known individual died on June 17, 1987.
↑ United States. Oil Pollution Act of 1990. Pub. L.101–380 Approved August 18, 1990.
↑ United States. Clean Air Act Amendments of 1990. Pub. L.101–549 Approved November 15, 1990.
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