Lewis is the author of the acclaimed books Green Innovation in China (2012) and Cooperating for the Climate (2023) and is a leading expert on climate and energy-related issues in China and in the U.S.-China relationship. She has recently published on the climate implications of green industrial policy, China’s just transition away from coal, opportunities for U.S.-China cooperation on renewable energy development finance, and the impact of artificial intelligence on climate change research. At Georgetown, Lewis has led several dialogues facilitating U.S.-China climate engagement, including the Clean Energy and Climate Research Group and the U.S.-China Research Group on Climate Change with the Initiative for U.S.-China Dialogue.