That's the final outcome of a study in ACS' journal Environmental Research & Technology, which resolves long-standing questions about resources of air pollution in charge of Asia's infamous atmospheric brown clouds. -rjan Gustafsson and colleagues from China, South Korea and america point out within their study that nobody has been particular about the exact sources of soot, or ‘black carbon,’ air pollution from the People's Republic of China.AMERICA faces a shortage of between 124,000 and 159,000 physicians by 2025. Already at least 22 states and 15 medical specialties have reported physician workforce shortages, including in medically underserved regions and front-series specialties including primary treatment and general surgery. To make sure that medical students can complete their training and become physicians, the AMA will highly advocate for financing from all payers, both public and private, for residency schooling positions. The number of U.S. Medical college graduates is increasing, but the amount of residency positions is not keeping up to because of lack of funding. Related StoriesMagnetizing biomolecules: an interview with Dr.S.