tobacco vs alcohol deaths Deaths: National Trends and Variation by Demographics and States President Obama turns down joint,

Dimensions: 1965 x 3307 px | 16.6 x 28 cm | 6.6 x 11 inches | 300dpi Date taken: 1926 Location: UK More information: This image could have imperfections as its either historical or reportage

Complex medical histories are often reduced to dramatic headlines: Smoking caused it. Toxic dust caused it. Stress caused it. It was genetic. These explanations may appear clear but often exceed the available evidence

Ground-level ozone is a secondary pollutant that forms when NO x combine with volatile organic compounds (generated by sources such as motor vehicles and industrial processes)

Regular Maintenance: Implement a schedule of regular inspections to catch potential problems early