Both sources are superior to corn ethanol (nearly everything is), but they are incurably intermittent, which makes them of marginal value in a world that demands always-available power.
Incurably ill patients grapple with both despair and hope of such magnitude that they are willing to try unproven embryonic stem cell treatments overseas despite mounting evidence that doctors who perform such procedures, currently not approved in the United States, do so only to convert hope into cash.