I think the interview does a good job of addressing problems with current biofuel sources (corn in the US, sugarcane in Brazil). It doesn't cover the technologies that are still in R&D or moving from R&D to production (e.g., algae, cellulosic ethanol). I think some of the current research has great promise, although of course biofuels will be only part of a possible renewable energy-based future (conservation and reduction of sprawl will be more important). Interestingly, both Fidel Castro and the Bush-appointed head of the DOE have come to this same conclusion, as discussed here: http://science.slashdot.org/article.pl?sid=07/03/29/2342224 Slashdot has pretty good coverage of biofuels, although of course half their readers are crazy libertarians. Here's more coverage of the same story as in the radio interview: http://science.slashdot.org/article.pl?sid=07/04/02/2144205 JMC -- John-Marc Chandonia (jmc@sfgreens.org) http://sfgreens.org/