Veerabhadran “Ram” Ramanathan is an atmospheric scientist whose research transformed modern climate science. His pioneering work demonstrated the powerful warming effects of chlorofluorocarbons and other short-lived climate pollutants, broadening scientific understanding of global warming beyond carbon dioxide alone. A Distinguished Professor at the Scripps Institution of Oceanography, Ramanathan has helped shape international climate policy through decades of research on atmospheric chemistry, climate change, and sustainable development.