Researchers in the journal Nature argued this week that one of the most effective ways to tackle global warming will be to take carbon dioxide right out of the atmosphere.
A start-up called Sapphire Energy has taken what might be the farthest reaching step yet to turn algae into the kind of fuel you could pump into your gas tank.
This past year, farmers enrolled nearly 3 million acres in the National Farmers Union carbon credit program, keeping enough carbon dioxide stored in the soil to offset the yearly emissions of 320,000 automobiles.
Proponents say IGCC plants are cleaner than traditional plants because they don’t emit harmful pollutants during combustion. And that means the plant could make more use of Indiana coal, which is higher in sulfur than coal from western states.