(April 20, 2009 - Insidermedicine) From London - According to a study in the International Journal of Epidemiology, researchers have found another reason to stay slim. Compared to more lean populations with normal BMI distribution, populations where 40% of people are obese require 19% more food energy, which produces more greenhouse gases. The researchers conclude that staying slim is good for both health and the environment.

From Maryland - According to research in the Archives of Ophthalmology, intravitreous injection with Macugen may help prevent vision loss. In a study of nearly 100 patients diagnosed with central retinal vein occlusion, researchers found that as few as 6% of patients experienced further vision loss when treated with Macugen, compared to 31% of controls. However, the drug was not effective at reversing vision loss.

And finally, from Denver - According to a study presented to the American Association for Cancer Research, a urine test may predict the risk for lung cancer in smokers. In a study of nearly 500 people, researchers found that those with the highest levels of a particular biomarker called NNAL in their urine had a 2 times greater risk of developing lung cancer than those with the lowest levels.

For Insidermedicine in 60, I'm Dr. Susan Sharma.