Greens Leader Bob Brown has welcomed Dick Smith's new book venture Dick Smith's Population Crisis launched today in Sydney.

"I'm looking forward to reading it. Dick makes a great contribution to Australian debate about population and resource pressures in this age of consumerism. We may not always agree with him but welcome his courage, commitment and stimulus to get us all thinking about the big issues of the day," Senator Brown said.

"He's right that exponential growth is clearly not sustainable."

The federal Minister for Forestry, Senator Joe Ludwig, was nonplussed when questioned today about piles of corn in a burnt and blackened forestry coup under Tasmania's Mt La Perouse.

Greens Leader Bob Brown said during Senate estimates that he saw corn distributed in piles along a logging road on Saturday. He asked Minister Ludwig if the corn was laced with poison to kill marsupials, including rare and endangered species (eg ringtail possums and wombats).

Bob Brown, speaking to David Hill on Radio Australia's Pacific Beat, says Australian mining companies operating in Papua New Guinea should adhere to Australian environmental and ethical standards.

Australian Greens Leader Senator Bob Brown will deliver the Greens' budget reply speech at 8pm on Thursday May 12th. You can watch it live here.

Bob held a press conference, broadcast on Sky News, to discuss various budget measures including the government's misguided tax break for big business.

Australian Greens Leader Senator Bob Brown was interviewed on ABC News Breakfast, where he discussed the Greens' impressions of the 2011-12 federal budget.

Australian Greens Leader Senator Bob Brown spoke with ABC News Radio's Fran Kelly about the 2011-12 federal budget.

Senator Bob Brown held a press conference where he discussed the government's 2011-12 federal budget.

Public mental health and private mineral wealth are the big winners out of this year's budget, Greens Leader Bob Brown said today.

"The Greens are celebrating the $1.5 billion boost to mental health funding, although we are shocked to discover that almost $0.5 billion is outside the forward estimates. There is a bias in the overall budget to the influential mining barons who are unelected and send massive profits overseas. While the mining corporations gain, programs for Australians, including the environment have been cut by billions," Senator Brown said.

The Australian Greens will push for a sovereign wealth fund to help fund the needs of future generations, as well as seek to improve budget measures in the immediate budget cycle, Greens Leader Bob Brown said today.

"A sovereign wealth fund could underpin Australia's move into a low-carbon future, serving as a source of funding for long-term projects such as high-speed rail and metro light rail," Senator Brown said in Hobart.

Australian Greens Leader Senator Bob Brown gave a press conference from Brisbane where he is attending the senate inquiry into Koala habitat.

He said it's time to rethink Australia's deployment to Afghanistan.

Australian Greens Leader Bob Brown has welcomed the federal government’s acknowledgement of accommodation options outside the Tasman National Park as part of the controversial Three Capes proposal.

“Federal Infrastructure Minister Anthony Albanese has told us that the Parks service is taking the community’s concerns into account in its planning for where accommodation for a revamped walk will go,” Senator Brown said in Hobart.