Question

When was the Montreal Protocol first enacted?

• A. 1987
• B. 1985
• C. 1992
• D. 1990

Answer 1

Answer:

A. 1987

The Montreal protocol

An international treaty aimed at banning the products that causes ozone depletion at various levels in 1987, Vienna summit. By the implementation of the treaty the ozone depletion over the Antarctic region has considerably lowered.