(July 9, 2011 - Insidermedicine)  From Boston - Research published in the British Medical Journal finds that women who sit for long periods are more likely to develop blood clots in the lungs. Following nearly 70,000 women for 18 years, researchers found that women who spent over 41 hours a week outside of work sitting were at 2x increased risk of  suffering a pulmonary embolism.  From Ohio - Air pollution may raise risk of depression, as well as learning and memory problems, according to a report published in Molecular Psychiatry. Researchers exposed mice to either filtered air or polluted air for 6 hours a day, 5 days a week for a 10 month period. Results showed that mice exposed to the polluted air had impaired memory on a variety of tests, and also showed increased inflammation in the hippocampus--an area of the brain responsible for mood, memory and learning. And finally, from California - A cox-2 inhibitor may be able to prevent lung cancer in former smokers, according to a report published in Cancer Prevention Research. Randomizing 137 former smokers to either celecoxib or placebo, researchers found that the cox-2 inhibitor greatly improved measures of lung health and also reduced lung nodules.