Australian Greens Leader Christine Milne says the Liberal Party's push to remove the charitable status of environment groups amounts to an attack on democracy.

"This is an extension of the Abbott government's ideological attack on the environment," said Senator Milne.

"Tax deductibility should apply to all groups that benefit the community and it's not fair for the Liberals to blacklist environmental groups just because they don't like what they stand for.

Australian Greens Leader Christine Milne has praised the World Heritage Committee decision overnight to uphold Tasmania's Wilderness World Heritage boundaries as a victory for common sense.

"This is a great win for the forests, for wildlife and for Tasmania," Senator Milne said.

"It's been clear for decades that these forests are of world heritage value, the only person unable to see it is Tony Abbott.

Shree Minerals has now confirmed its iron ore operation in the Tarkine has been suspended and the Australian Greens say it's clear Tasmania's future is not in mining.

"This cynical political experiment has failed. It's time to stop pretending that destroying the Tarkine will deliver any kind of prosperity to Tasmania," said Greens Leader and Tasmanian Senator Christine Milne.

"Who could forget the pre-election hype from then AWU president Paul Howes, federal minister Tony Burke and Premier Lara Giddings, trying to justify destruction of the Tarkine?

A Senate inquiry has called on the Abbott government to withdraw its proposal to reduce the Tasmanian Wilderness World Heritage Area by 74,000 hectares, Australian Greens Leader Christine Milne said today.

"The Senate inquiry has also called for Australia to stand by its promise to the World Heritage Committee to assess by June 2015 the Aboriginal cultural values of additions to the Area," Senator Milne said.

The mining company that was supposed to bring a jobs boom to northwest Tasmania is coming unstuck, prompting the Australian Greens to once again call for the Tarkine to be protected.

Amid reports that Shree Mining is in serious financial strife, Greens Leader and Tasmanian Senator Christine Milne says it's clear that promised economic and jobs benefits were nothing more than unsubstantiated hype.

Senator MILNE (Tasmania-Leader of the Australian Greens) (18:03): I rise today to take note of the honourable Greg Hunt's letter relating to the Gunns pulp mill and, most particularly, the call that the Senate made to commit to maintaining the environmental requirement that excludes wood sourced from native forests from being used as feedstock for any pulp mill.

The Australian Greens Leader, Senator Christine Milne, explains why there will be no global market for the wood sourced from Tasmania's Wilderness World Heritage Area following the Abbott government's ideological attack on forests.

The Australian Greens say Tony Abbott's claim that Australia has too much protected forest is wrong and will concern Australians who treasure our precious national parks and forests.

"Families and communities treasure our national parks. Tony Abbott is completely out of touch," Greens Leader Christine Milne said.

"Tony Abbott's anti-environment agenda is also anti-jobs. There is no economic future for Australia in trashing our precious native forests and national parks.