The same isn't true for the environment. Unlike Peak Oil where economic incentives simultaneously would encourage smaller cars with more efficient engines while also directing research into more advanced oil retrieval (or at the very worst biofuels) the environment is not something the market will automatically solve. Quite the opposite. It will push up against it until there is sufficient political resistance to overcome market resources attempting to maintain the status quo. We have a real problem, but it isn't oil or cobalt.