I’ve been accused sometimes of being too cheerful an environmental writer, not nearly doom-and-gloom enough to get people to turn from their wasteful ways. I believe, yes, that’s it’s better to do something than to do nothing. But to claim that it’s easy and cheap to solve the problems caused by driving, as does the TerraPass website, “Prevent global warming, reduce carbon dioxide pollution, promote alternative energy”, strikes me as Pollyannaish, at best. Venture capital looking for a way to turn a profit, at worst.