172565 (United States) published:
PROMPT: Earth Day Writing Competition 2019
Early College High School
In May 1985, scientists discovered the ozone value had decreased over the Halley and Faraday Research Station when the Sun appears every recurring spring. The stratosphere was depleting rapidly. The culprit was chlorofluorocarbons (CFCs). CFCs were commonly used in refrigerants and aerosols but were replaced by hydrochlorofluorocarbons (HCFCs). Although HCFCs are somewhat safer, they were replaced again by Hydrofluorocarbons (HFCs). Through ozone depletion,...
3 months ago