The Australian division of PricewaterhousCooper has announced a bold plan to become carbon neutral within 18 months.

PwC is the world's largest accounting firm, and has been a leader in measuring the economic implications of global warming and the costs of addressing climate change. In October, the firm produced a "green growth plus" strategy outlining how to reduce worldwide greenhouse gas emissions by 60% by 2050 and stabilize global CO2 levels at 450 parts per million. It appears they are now putting that plan to test inside their own company.

In the process, they are also creating a stranglehold in the carbon accounting market and the potential for windfall profits in the coming decade as increasing numbers of businesses and governments turn towards carbon reduction strategies.