China has launched a first-of-its-kind power generator that works with carbon dioxide instead of steam, like traditional generators in power plants. Perhaps more importantly, however, the new generator works with waste heat and boasts a much higher efficiency than existing ones at doing that. According to the company that designed it, the generator is the start of a new era, the South China Morning Post reported. Normally, thermal power generators work in one of two ways, both relying on heat to turn a turbine. In coal power plants, the burning…