Nature World News: Air pollution can increase risk of lung cancer and heart diseases, according to two new studies. A couple of recent studies have found that the rise in pollution in China resulted in lower life expectancy in the country. The two new studies have found that air pollution, even at low levels, could lead to serious health complications. In the first study, researchers looked at the impact of air pollution on the risk of lung cancer, especially adenocarcinoma. This study was based on data obtained...