The Opposition's plan to plant 20 million trees while its own Regional Forest Agreements foster the destruction of Australia's biggest forests is incongruous, Australian Greens Leader Bob Brown said today.

"The Howard government legislated the destruction of Australia's biggest carbon banks - in New South Wales, Victoria, Tasmania and Western Australia, largely for woodchip export to Japan, converting these forests into greenhouse gases.

"If Mr. Abbott or Prime Minister Rudd were to end the destruction they would cut greenhouse gas emissions by 15-20%.

"Planting 20 million seedlings while cutting millions of trees in mature forests is an Abbott absurdity," Senator Brown said.