Scientists are working on ways to make coal power plants produce less carbon dioxide to help fight global warming. They are looking at using types of coal with less carbon and adding in eco-friendly biomass. New technologies are being developed to make coal power plants more efficient. One idea is to turn coal into gas before burning it to generate electricity. Another idea is to combine coal with a fuel cell system to make power. Researchers are also studying ways to capture and store the carbon dioxide produced by coal plants. They have created a high-efficiency power system that removes carbon dioxide and is powered by coal. This system uses a method called oxy-fuel in combination with gasification to reduce carbon emissions.