Plug-in hybrid
In 2006, Romm and Prof. Andrew A. Frank co-authored "Hybrid Vehicles Gain Traction", published in "Scientific American", in which they argue in favor of Plug-in hybrid electric vehicles. The same year, Romm published "California's Hydrogen Highway Reconsidered" in "Golden Gate University Law Review". In 2007, he co-authored "Plugging into the Grid: How Plug-In Hybrid-Electric Vehicles Can Help Break America's Oil Addiction and Slow Global Warming" in the Progressive Policy Institute's "Policy Report". Romm contributed a chapter to the 2007 book "", disputing that "The Hydrogen Economy Is a Panacea". In 2008, "Nature" published Romm's article "Cleaning up on Carbon", in which he advocated "accelerating the deployment of the 11 wedges so they begin to take effect in 2015 and are completely operational in much less time than originally modelled by Socolow and Pacala." In 2011, "Nature" published Romm's article "Desertification: The next dust bowl", exploring the dangers to the world economy and populations of droughts that are projected to be caused by climate change, such as food insecurity.