"Haotian Wang, an assistant professor of chemical and biomolecular engineering at Rice University, sets up an experiment with a carbon dioxide reduction reactor on Thursday, Sept. 5, 2019, in Houston. Wang said the device converts carbon dioxide into pure liquid fuel. ""We can only make very tiny contributions, but all of those tiny things add up and the momentum can be changed,"" Wang said, when asked about the technology's potential impact on climate change."