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CLOSE TO HALF of Americans say global warming threatens their future well-being and safety, according to a 2008 survey by researchers at George Mason University. Increasingly, evidence shows they're right. Here are some climate-related problems you're apt to hear more about in coming years and how to limit their effects:
Allergies and asthma. Warmer temperatures and higher carbon-dioxide levels might boost pollen growth and lengthen blooming seasons. In a study by a plant physiologist at the Department of Agriculture, ragweed plants were grown in a rural area and in a city with warmer temperatures and 30 percent more [CO.sub.2]. The city plants produced five times as much pollen. For asthma sufferers, more ground-level ozone (which increases with hotter weather) could mean more attacks.
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What to do: Keep windows closed and air conditioning on when pollen counts are high (see counts at www.aaaai.org). For more on dealing with allergies and asthma, go to www.ConsumerReportsHealth.org.
Insect-borne diseases. With rising temperatures and changing rainfall patterns, mosquitoes that carry malaria and the West Nile virus have spread northward and to higher elevations. Also expected to spread: Lyme disease and dengue fever, a ...