Northern river reversal, an ambitious project to divert the flow of the Northern rivers in the Soviet Union, was abandoned, primarily for environmental reasons.
April
The Chernobyl disaster, a catastrophic nuclear accident, occurred at the Chernobyl Nuclear Power Plant in Ukraine.
The Balloonfest '86, a publicity stunt in Cleveland, Ohio, it aimed to break the world record for the largest simultaneous balloon release. However, the event led to unforeseen environmental damage and disruptions in the city, where thousands of balloons ended up in Lake Erie, hampering search and rescue operations and littering the shores.
November
The Sandoz chemical spill, a major environmental disaster caused by a fire and its subsequent control, occurred at the Sandoz agrochemical storehouse in Schweizerhalle, Basel-Landschaft, Switzerland, on November 1, 1986. It released toxic agrochemicals into the air and resulted in tons of pollutants entering the Rhine river, turning it red.
The West Coast Accord was signed between government, industry and environmental organisations concerning the conservation forests of the West Coast of New Zealand.
December
The Environment Act 1986 is passed in New Zealand, established the Ministry for the Environment and the Office of the Parliamentary Commissioner for the Environment.
