Gore said heads of state should get "personally involved" by meeting "several times" over the coming 12 months to ensure that an ambitious climate-protection treaty is signed at a U.N. summit in late 2009 in Copenhagen, Denmark.

But before Copenhagen comes Poznan: Delegates from 189 countries are currently in the western Polish city to wrap up the U.N. conference intended to pave the way to more concrete negotiations leading up to and in Copenhagen.

Speaking to a large audience of delegates, NGO officials and journalists at the Poznan conference, Gore urged the world to commit to greater emissions reductions in the face of evidence that unhindered climate change will make the Earth "uninhabitable."

In a demand that drew loud cheers and lengthy applause from the audience, he called on the world's governments to bring down carbon dioxide levels to 350 parts per million -- the amount deemed safe by most experts.

Currently, the atmosphere holds 385 ppm, and the U.N. process looks likely to commit itself to a 450 ppm target. Gore called this goal "inadequate."

The former vice president has been warning of the dangers of global warming for years, long before "most of the world thought it mattered," said Yvo de Boer, the United Nations' top climate official. In 2007 Gore won the Nobel Peace Prize for his campaign to draw attention to global warming, and on Friday here in Poznan he was received like a rock star by environmental activists, virtually all of whom also lobby for the 350 ppm limit.

Earlier this week some 100 youths lay in the rain in downtown Poznan to create the image of a sinking island; organized by the youth group 350.org, the youths have been calling on delegates to fight for a climate treaty that meets the 350 ppm target -- one that is vital for several island states facing extinction from rising sea levels.

Reaching a bold climate treaty is a "moral cause" and a "generational mission" that citizens and governments need to embrace more vigorously, Gore said.

"We need to focus clearly and unblinkingly on this crisis, rather than spending so much time on O.J. Simpson and Paris Hilton and Anna Nicole Smith," Gore said.

While negotiations between the world's governments are ongoing, "we cannot negotiate with the facts, with the truth about our situation, with the consequences of unrestrained dumping" of billions of tons of carbon dioxide into the atmosphere, Gore said.

Yet Gore had some good news as well: Across the world, developing countries are making bolder efforts to stop climate change, he said.

Gore lauded Brazil for stopping deforestation and China for a green economic stimulus of $600 billion over the next two years, as well as "the largest tree-planting program the world has ever seen."

Gore praised local, state and regional climate-protection efforts inside the United States, which, together with the presidency of Barack Obama, will turn Washington into a global leader in climate change, he said.

Delegates in Poznan have huge hopes for a new U.S. administration to turbocharge global climate-protection efforts, and Gore said they wouldn't be disappointed.

"In spite of remaining obstacles, I believe that the causes for hope and optimism are greater than the causes for doubt and discouragement, and I believe the road to Copenhagen is now clear," he said. "To those fearful that it's too difficult … I would say it can be done, it must be done, let's finish this process in Copenhagen."

Just around the time when Gore spoke, EU ministers in Brussels, after some significant bickering, reached an agreement on the body's ambitious and binding climate-protection goals.

The agreement sends a "clear message to the negotiations in Poznan and onwards to Copenhagen that difficult roadblocks can be overcome and resolved," the United Nations' De Boer said.

earlier related report
Global climate deal? Yes we can, Gore says
Poznan, Poland (AFP) Dec 12 - The way is "now clear" to sign a global climate agreement in 2009, helped greatly by the election of Barack Obama as US president, Nobel-winning green activist Al Gore said on Friday.

"I would like to relay a message that I heard from the people of the United States of America this year that I think is very relevant to the task the world is facing over this next year: 'Yes we can.'," Gore said to a standing ovation on the final day of UN climate talks in Poznan, Poland.

Gore said that before coming to Poznan he had held a meeting with Obama in Chicago at which the president-elect had assured him that climate change would be a "top priority of his administration."

Obama "emphasised that once he is president the United States will once again engage in these negotiations and help lead toward a successful conclusion," Gore said.

He read out several public statements on climate change from Obama and said: "Do not discount these words."

Delegates in Poznan are hoping that Obama, who takes office on January 20, will be a breath of fresh air when it comes to international climate talks after eight years of the outgoing president George W. Bush.

Obama has said he wants the United States to commit to reducing its greenhouse gas emissions to 1990 levels by 2020, and by 80 percent in 2050, mainly through a 150-billion dollar, 10-year programme to develop renewable forms of energy.

Some 11,000 participants from more than 190 countries have gathered in Poznan to lay the groundwork for a treaty agreement to sharply reduce the emission of greenhouse gases that drive global warming.

The deal is to be signed and sealed in Copenhagen by the end of 2009, but progress has been excruciatingly slow, in part because the United States under Bush turned it back on the Kyoto Protocol.

"I think the road to Copenhagen is now clear," Gore said.

The former US vice president said that reaching an accord was a matter of survival for the planet.

"Our home, Earth, is in danger. What is at risk of being destroyed is of course not the planet itself, but the conditions that have made it hospitable for human beings," he said.

Halting global warming was not just a political imperative, he added, but a moral issue, and world leaders must step up over the coming year and play a more active role.

"It is time, between now and the gathering in Copenhagen, for heads of state to become personally involved in meeting several times," he said.

On Thursday, United Nations Secretary General Ban Ki-moon said in Poznan that he was considering convening a summit on climate change during the next UN General Assembly session that begins in September 2009.

Negotiations among the 192-member UN Framework Convention on Climate Change (UNFCCC) are mid-way through a two-year "roadmap" set down on the Indonesian island of Bali last year.

The envisioned Copenhagen treaty will amount to an action plan for curbing greenhouse gases and channelling help for vulnerable countries beyond 2012, when current provisions expire under the Kyoto Protocol.

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