John Latham is a cloud physicist who has extensively researched storm clouds and lightning. His main focus is now geoengineering, an area of research that examines the feasibility of artificially manipulating the climate to offset global warming. He has proposed altering extensive low-lying marine stratocumulus clouds by spraying seawater droplets into them, thereby increasing the amount of solar energy that they reflect. Computer model studies suggest that this technique could produce significant global cooling. The environmental impacts of such an approach remain uncertain.