Electric and biofuel-powered cars offer solutions for a carbon-constrained world, but has early excitement about alternative fuel vehicles fizzled prior to the July 1 start date for Australia's carbon tax? Before the rubber really hits the road and hybrids and "plug-in" cars become mainstream, there’s still a myriad of issues to be addressed. Infrastructure is one, while research shows some biofuels may generate more problems than they solve. The shift to alternative fuel cars must come, says John Sterman, the Michael J Crouch Visiting Professor at the Australian School of Business, along with many other alternative modes of transport.