Case Studies

Ozone Depleting Substances
-The term ozone depleting substance is given to any substance the government identifies that depletes the ozone layer. Before the Montreal Protocol was passed in the early 1990’s, the substances now known as ozone depleting substances were used in everyday life and no one knew how harmful they really were. Some of these substances were commonly found in household equipment like refrigerators and air conditioners. After scientists discovered how harmful these chemicals really were, they passed the Montreal Protocol, which banned these chemicals and substances from daily use. Although most ozone depleting substances are not used anymore, there are still more out there that harm the ozone layer. An example of a harmful chemical could be nitrous oxide (N2O). Not only does this compound have a damaging affect on the ozone layer, this substance is also bad for global warming