Martin Lloyd Williams (22 November 1947–21 September 2020)[1] was a Welsh chemist and environmental scientist who made important contributions to the science of air pollution and its incorporation into public policy in the United Kingdom.
[2] Williams was one of the first scientists to recognize the harmful health effects of ground-level ozone, in papers published in Nature in the mid-1970s,[3][4] and one of the first to study vehicle emissions in the real world (rather than under artificial laboratory conditions).
[2][5] He also established the first systematic programme to produce inventories of UK national air pollution emissions.
[2][8] In 2010, Williams returned to academia as a professor and Head of Science Policy and Epidemiology in the Environmental Research Group at King's College London,[2] where his research interests included the air quality in London,[9][10] the measureable health benefits of improved air quality,[11][12] and the connections between climate change and air pollution.
[6][17] Shortly before his death, the Institute of Air Quality Management invited him to be its inaugural Honorary Fellow.