Career
He is a pioneer in carbon management and is the first to suggest capturing carbon dioxide from air in the context of addressing climate change. His current work includes the demonstrating and improving passive methods to remove carbon dioxide from the atmosphere, integrating air capture technology with applications for using carbon dioxide, exploring safe and permanent disposal options for carbon dioxide, and identifying opportunities for automation and scaling. His publications have been cited 5842 times as of November 12, 2015.
His h-index is 31.
Previously, he was the director of the Lenfest Center for Sustainable Energy at the Earth Institute and Faculty in the Earth and Environmental Engineering department at Columbia University from 2001 - 2014. He, along with CNCE executive director, Allen Wright, co - founded of the first privately held air capture company Global Research Technologies (GRT) in Tucson, Arizona where they demonstrated the moisture swing. Prior to his academic work he held appointments at the theoretical division of Los Alamos National Laboratory for nearly 17 years.