When Alexander A. Dunlap and Benjamin Sovacool traveled across the country to investigate solar panel supply chains, they discovered the process behind producing clean solar energy was not so clean after all.
In 1987, the United Nations ratified the Montreal Protocol, banning the production and consumption of CFCs for all member countries.
Nearly 40 years later, the ozone layer is showing signs of recovery, according to a Sept. 16 World Meteorological Organization report.
