The Australian Greens will bring a bill into the Senate, in the next fortnight, to require the permission of landholders before companies can explore for, or extract, coal seam gas, Greens Leader Bob Brown announced today.

"Queensland's new Greens Senator Larissa Waters' bill will use the corporations power in the constitution to require coal seam gas corporations to get written permission before entering a farmer’s land," Senator Brown said.

Greens Leader Bob Brown today urged politicians of all stripes to engage in a mature debate about ownership of Australians' assets, including farm land and minerals wealth.

"The Australian Greens have one initial solution - the Foreign Acquisitions Amendment (Agricultural Land) Bill 2010 jointly sponsored by Christine Milne and Nick Xenophon - with all acquisitions by foreign interests to be subject to a proposed $5 million threshold," Senator Brown said in Hobart.

Greens Leader Bob Brown spoke to reporters in Canberra today about President Obama’s Afghanistan announcement, carbon price talks and Viscount Monckton.

Australian Greens Senators Bob Brown and Christine Milne met with the Prime Minister, the Treasurer and the Minister for Climate Change this morning and carbon price discussions are continuing, Greens Leader Bob Brown said.

"Further discussions are expected later in the weekend," Senator Brown said.

Australian Greens Leader Senator Bob Brown was interviewed this morning, where he welcomed Australians, including Dame Murdoch, speaking out in favour of pricing pollution. He also spoke about the eBay bidding for "Breakfast with Bob" ahead of tonight’s MidWinter Ball at Parliament House, the latest Newspoll, Greens legislation to prevent the export of live animals for slaughter and the need to process animals in Australia, and across-the-board support for plain-packaging for cigarettes.

Greens Leader Bob Brown today urged federal parliamentarians to unite behind new laws to stop live exports of animals for slaughter.

"We've written to the government and opposition to urge them to make debate on live exports a priority when parliament resumes on 14 June," Senator Brown said in Hobart.

Greens Leader Bob Brown, along with local residents and organisations, has made a submission to the Marine Planning Panel’s review of Tassal’s request to expand its Soldiers Point salmon farm, which held a public hearing in Hobart today.

“Many of these submissions expressed serious concerns about antibiotic use, damage to the marine environment, sustainability and noise. However, the planning authority’s written response to these submissions had too little scientific basis and too much unsubstantiated opinion," Senator Brown said.

Greens Leader Bob Brown today congratulated Treasury Secretary Dr Ken Henry for a quarter of a century of service to Australians and the Australian economy.

"Dr Henry should be particularly applauded for his work as Secretary over the past 10 years and, most recently, the tax review that included plans for Australia's tax system to address climate change and extract a fairer rate of return on the country's wealth being extracted by the big miners," Senator Brown said in Canberra.