reply to post by coyotepoet
Granted there are other factors (genetics, allergies, city pollution, etc.) and it doesn't confirm causation but, going along with the
pharmaceutical/medical bottom line (as one would expect with something airborne like chemtrails) just looking at Asthma:
Since 1980 asthma death rates overall have increased more than 50% among all genders, age groups and ethnic groups. The death rate for children under
19 years old has increased by nearly 80% percent since 1980. 
The prevalence of asthma has increased significantly since the 1970s. As of 2009, 300 million people were affected worldwide. In 2009 asthma caused
250,000 deaths globally.
More Americans than ever before say they are suffering from asthma. It is one of this country's most common and costly diseases.
Asthma rates in children under the age of five have increased more than 160% from 1980-1994
It is estimated that the number of people with asthma will grow by more than 100 million by 2025
Prescription drugs represented the largest single direct medical expenditure related to asthma, over $6 billion
In 2006, asthma prevalence was 20.1% higher in African Americans than in whites.
It's also interesting that minority populations have increased prevalence of Asthma as well.
We may be living longer but we have a harder time breathing.
edit on 25-3-2011 by coyotepoet because: clarity