The concept of utilizing wastes as new resources promises us a sustainable development. However, is this concept applicable in reducing CO2 emission by turning it into useful products? Maybe not. Authors from the Electric Power Research Institute present two challenges of CO2 capture: the massive scale of CO2 emissions and the theoretical minimal energy requirement of separation. Time has come when chemists, process engineers, and power plant operators should come together to develop new post-combustion CO2 capture strategies.