Black Carbon: An Overlooked Climate Factor

By some estimates, black carbon may account for as much as 18% of the planet's warming, making it the No. 2 contributor to climate change after carbon dioxide

• Why India Is Playing Hard to Get on Climate Change

Trying to Save a Key Drug in the Fight Against Malaria

A dangerous new malaria strain has taken hold on the Thai-Cambodia border. Can an ambitious new plan to bring cheaper, better drugs to malarial countries like Cambodia stamp out the world's third deadliest disease before it's too late?

• A Better Deal on Malaria

Behind the CDC's Soaring H1N1 Death Totals

In the span of a week, the CDC's official tally of U.S. deaths from swine flu has tripled. But does that say anything about the severity of the disease?

• Thermal Scanners Hunt for Swine Flu
• Top 5 Swine Flu Don'ts

Safety of Alcoholic Energy Drinks Questioned

The Food and Drug Administration is challenging makers of alcohol-infused energy drinks to prove their beverages are safe, citing complaints that the products can cause risky behavior and injury

Another Cause of Obesity: The Bacteria in Your Gut?

Diet, exercise and genes aren't the only factors responsible for body weight, say researchers, who are discovering evidence of another component: the bacteria in your gut

• Teen Obesity: Lack of Exercise May Not Be to Blame
• The Social Side of Obesity: You Are Who You Eat With

Wellness

A Possibility for Regrowing Breast Tissue?

A possible alternative for breast reconstruction after mastectomy? Australian researchers prepare for a trial to regrow breast tissue

Climate Change Conference

TIME looks at what's on the agenda for the talks in Copenhagen that begin on Dec. 2