Can coal be clean?

At the AlwaysOn GoingGreen conference in Sausalito, Calif., Tim Vail of Synthesis Energy says a mix of solutions is needed to solve our energy problems. Erik Straser of Mohr Davidow Ventures adds that although we do have natural resources still available to us, new technologies are needed to extract them in a cleaner, greener way.
Written by ZDNet Staff, Contributor