National Geographic: In a multipronged effort to boost “clean coal,” the Obama administration has announced a $1 billion project to demonstrate a new combustion technique, launched studies of where carbon dioxide could be stored underground, and unveiled recommendations meant to chisel away at regulatory barriers. But many supporters of the drive for carbon capture and storage (CCS) as a way to address the U.S. greenhouse gas pollution from coal-burning power plants say the flurry of moves in the past …