Among the world's most developed countries, Turkey and the Netherlands tax gas and carbon use at the highest rate; the U.S., Mexico and Canada tax carbon and gas at the lowest rates.

In Australia, Aussies are getting used to the first week under a new carbon tax. The country's biggest polluters are paying a steep $24 per ton of carbon emitted -- that's more than twice the cost of carbon permits in the EU.

Australia's parliament recently approved a law for taxing greenhouse gas emissions.