The effects of breathing unhealthy amounts of air pollutants

Radio Singapore International: The US Environmental Protection Agency has decided not to reduce the permissible levels of fine soot particles in the air. This decision has angered a group of scientists, citing health risks from such air pollutants. The scientists claim that exposure to such air pollutants can aggravate heart and lung diseases and cause premature deaths. Meanwhile, in Singapore, Malaysia, Thailand and Indonesia, the density of such fine soot particles in the air has increased ...Link