Lexington Herald-Leader: Eliminating greenhouse gases and developing new, non-petroleum-based fuels are two of America’s biggest environmental challenges. University of Kentucky researchers think algae might offer an answer. They propose to employ algae to scrub carbon dioxide from the flue-gases of coal-fire power plants — of which Kentucky has many — and use the algae to produce an oil that could then be refined into fuel. Carbon dioxide, or CO2, is the principal pollutant associated with global …