No legal limits have been established for most of the 75,000 man-made chemicals. Legal pollution limits do not provide any economic incentive to reduce pollution emissions below the legal limits. While nobody claims responsibility for the increased odds of getting cancer, a wide variety of pollutants from many sources have substantially increased our odds of getting cancer. Twenty years ago, the American Cancer Society said that 1 out of 4 Americans would get cancer. Today, American Cancer Society says the probability has risen to 1 out of 3.
Many researchers say that pollution is a frequent cause of cancer.
Smog over West Coast of Lake Michigan Viewed from north at 30,000 feet. A blanket of small particles covers most of the earth all of the time. As the photo above illustrates, the particles can reflect enough sunlight to prevent a clear view of the ground from aircraft. Microscopic particles released by fuel combustion, volcanoes and other sources can remain airborne for many days and travel thousands of miles. While the dust particles help to make sunsets more spectacular, they cause many health problems.