Description
Documents Johnston's many contributions as a pioneer of chemical kinetics and atmospheric chemistry. His basic research in these fields led to several practical applications, including early research into the molecular mechanisms creating smog. Johnston was a leading voice in sounding the alarm in the 1970s about human damage to the ozone layer. He was also a prominent opponent of a proposal in the late 1960s and 1970s to build a fleet of supersonic transport planes because nitrogen oxide emitted by the planes would deplete the ozone layer.