This will be hard to avoid. Joining asbestos, tobacco and UV rays, air pollution has been declared a carcinogen by the International Agency for Research on Cancer. The agency, which is part of the World Health Organization, declared that air pollution is more important than passive smoking in terms of cancer-causing materials. According to the IARC air pollution is a mix of the gases and particles, and many hope the report will push governments to do more to regulate it.
