BALI, Indonesia (Reuters) - Indonesia has planted millions of trees to soak up an estimated 50,000 tons of greenhouse gases to be emitted during U.N.-led climate talks in Bali, Environment Minister Rachmat Witoelar said on Monday.

More than 10,000 politicians, officials, activists and journalists are expected to attend the December 3-14 talks on the tropical resort island. Delegates will discuss ways to widen a U.N.-led fight against global warming to all nations.

BALI, Indonesia (Reuters) - The United States said on Monday it would seek a new global deal to fight climate change after Australia's move to ratify the Kyoto Protocol isolated it as the only developed nation outside the current U.N. pact.

"We're not here to be a roadblock," U.S. delegation leader Harlan Watson said on the opening day of a December 3-14 meeting of almost 190 nations in Bali, Indonesia, seeking to agree a roadmap to work out a successor to Kyoto which runs to 2012.

BALI (Reuters) - Climate talks launched in Bali on Monday must assure investors of future government backing for climate-friendly energy and building projects, said the host of the meeting, Indonesia's Environment Minister Rachmat Witoelar.

The talks in Bali, attended by some 190 countries, will try and lay the foundations for a new climate change deal in time to replace or extend the Kyoto Protocol from 2013.

A key challenge will be to entice business to invest in cuts in greenhouse gas emissions and prepare for climate change.

BALI, Indonesia (Reuters) - Australia won an ovation at the start of U.N.-led climate change talks in Bali on Monday by agreeing to ratify the Kyoto Protocol, isolating the United States as the only developed nation outside the pact.

JAKARTA (Reuters) - Many of Indonesia's islands may be swallowed up by the sea if world leaders fail to find a way to halt rising sea levels at this week's climate change conference on the resort island of Bali.

HONG KONG (Reuters) - Oil bounced back above $89 a barrel on Monday, steadying from last week's near $10 slide, but Asian stock markets took a breather after posting their best weekly gain in more than three months.

PHILADELPHIA, PA – Buyers beware - that so-called “Green” product is likely stretching the eco-truth according to the Six Sins of Greenwashing, a study released today by TerraChoice Environmental Marketing.

The Six Sins of Greenwashing found that of 1,018 common consumer products ranging from toothpaste to caulking to shampoo to printers, randomly surveyed for the study, 99% were guilty of “greenwashing.”

NEW YORK (Reuters Health) - Exercise seems to increase the production of naturally occurring brain chemical with antidepressant effects in mice, researchers reported Sunday.

The findings, published in the journal Nature Medicine, point to potential new ways to treat depression in people.

Studies have found that exercise can help ease depression symptoms, but the reasons for the benefit have not been clear. For the new study, scientists used a tool called a microarray to examine how exercise changed gene activity in the brains of mice.

Seattle - More and more, Congressional candidates are turning to the Web as a tool to mobilize their base and build credibility with undecided voters, according to findings in a new book by a University of Washington researcher.

"We're seeing a slow-but-steady increase in Web mobilizing," particularly in competitive House and Senate races, said Kirsten Foot, an associate professor of communication.

Most of the world's urban areas have already experienced far more dramatic temperature hikes over the past few decades than the 2.6°C increase expected from global warming over the next hundred years.

WASHINGTON (Reuters) - Irked spouses looking for a reason to stay married were offered a novel rationale by U.S. researchers on Monday: divorce is bad for the environment.

The global trend toward higher divorce rates has created more households with fewer people, scientists at Michigan State University reported in the Proceedings of the National Academy of Sciences.

NEW YORK (Reuters) - A political action group that bombarded media around the world with false reports of U.S. businesses pledging a major cut in greenhouse gas emissions said its motivation was to get big companies to take greater action on climate issues.

Greenwash Guerrillas, a loose-knit group of students and workers for nonprofit organizations, posed as phony public relations officials and targeted energy reporters around the world on Monday with e-mails and telephone calls.

WASHINGTON (Reuters) - More than 40 million people in the United States say they cannot afford adequate heath care and go without drugs, eyeglasses or dental treatment, according to a federal report released on Monday.

The latest look at the state of U.S. health care also shows that while death rates from cancer and heart disease have dropped in recent years, just as many Americans are dying in car crashes.

WASHINGTON (Reuters) - Lives are at risk because the U.S. Food and Drug Administration is woefully behind in the latest scientific advances and is underfunded for its vast responsibilities, an expert panel will tell the FDA on Monday.

In a 56-page report titled "FDA Science and Mission at Risk," which has been posted online, officials will hear that inadequate staffing and poor retention, out-of-date technology and a general lack of resources mar the agency's ability to do its job.

WASHINGTON (Reuters) - Nearly half of all U.S. doctors fail to report incompetent or unethical colleagues, even though they agree that such mistakes should be reported, researchers said on Monday.

They found that 46 percent of physicians surveyed admitted they knew of a serious medical error that had been made but did not tell authorities about it.

"There is a measurable disconnect between what physicians say they think is the right thing to do and what they actually do," said Eric Campbell of Massachusetts General Hospital and Harvard Medical School in Boston, who led the survey.

Depression, panic disorders, and post-traumatic stress were diagnosed in 49 percent of New Orleans residents surveyed five to seven months after the storm struck on August 29, 2005, the study found.