Calls for Al Gore to take another run at the White House grew louder Friday on the heels of the former vice-president's Nobel Peace Prize victory.

But it appears unlikely he will appease his devoted fans by throwing his hat into the 2008 election.

After accepting the Nobel Prize, he promised only to use the exposure to stress his environmental concerns.

"This is a chance to elevate global consciousness about the challenges that we face now," he told reporters on Friday.

Gore won the Nobel Peace Prize with an international network of scientists for their efforts to battle human-driven climate change.

The win capped a year that saw Gore win an Oscar for his documentary, "An Inconvenient Truth," and an Emmy for his television and Internet news venture, Current TV.

After each win, pleas for Gore to return to politics grew louder.

But Gore, who said he fell out of love with politics, has remained adamant that he had no plans to run.

After serving as Bill Clinton's vice-president for eight years, Gore won the national popular vote for president in 2000 but lost the White House to Bush when the U.S. Supreme Court halted a recount in Florida.

Some analysts say his success since then should be enough vindication to bring him back to politics for the 2008 election.

Gore's spokeswoman, Kalee Kreider, said his efforts were focused in another direction, and that he was working to educate people about the climate crisis as a private citizen.

A group called DraftGore.com took out a full-page advertisement in the New York Times this week, pleading him to reconsider.

"America and the Earth need a hero right now,'' said the open letter to Gore, "someone who will transcend politics as usual and bring real hope to our country and to the world.''

On Friday, the group issued a statement saying Gore "is in a unique position to make a difference in the world. We believe under these circumstances he has no choice but to take the one step left to have the greatest impact in changing policy on global warming -- run for president.''