A twenty year study that culminated in a Nobel Prize in Chemistry seems to be a pretty good indicator that these people had something right.
NOBEL PRIZE TO OZONE RESEARCHERS
STOCKHOLM, Sweden- Three noted chemistry researchers have been awarded the Nobel Prize in Chemistry for atmospheric studies which led to an understanding of how the ozone layer forms and decomposes. The Royal Swedish Academy of Sciences praised the researchers' contribution "to our salvation from a global environmental problem that could have catastrophic consequences."
The one million dollar prize will be shared by F. Sherwood Rowland, Bren Professor of Chemistry, UC Irvine; Mario Molina, who currently is a member of the Department of Earth, Atmospheric and Planetary Sciences at Massachusetts Institute of Technology; and Paul Crutzen, a professor at Max-Planck Institute for Chemistry in Germany and adjunct professor at Scripps Institution of Oceanography at UC San Diego.
The award culminates 20 years of study on the ozone layer by the researchers. The three winners of the Nobel Prize in Chemistry are the first ever to receive the award for atmospheric chemistry or environmental science.