The CPRS was ultimately suspended last month until at least 2013 because of its declining popularity.

FORBES: Climate Fight Down Under

The "professional diligence" test under the CPRs mean that buyers can reasonably expect traders to carry out pre-sale checks in relation to the history, mileage and mechanical condition of the car.

BBC: Q&A: Buying a used car

The letter, organized by Beyond Zero Emissions, comes as a response to the failure of the much-compromised Carbon Pollution Reduction Scheme (CPRS), which was pilloried as a giveaway to fossil fuel industries and ineffective for driving clean energy deployment.

FORBES: Climate Fight Down Under