A year earlier, Richard Stolarski and Ralph Cicerone at the University of Michigan had shown that Cl is even more efficient than NO at catalyzing the destruction of ozone.
Setahun sebelumnya, Richard Stolarski dan Ralph Cicerone di Universitas Michigan telah menunjukkan bahwa Cl bahkan lebih efisien daripada NO dalam mengkatalisis penghancuran ozon.