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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
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The horizontal fraction bar was introduced by the Arabs.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
![Boreal forests, such as this one in Siberian Russia, are dominated by a few species of conifer trees](https://biology-forums.com/gallery/47/medium_33_27_08_11_11_56_24_1548799.jpeg)
![The 2012 U.S. presidential campaign rang with “get tough” cries to end Iran’s nuclear capacity and c](https://biology-forums.com/gallery/47/medium_262797_12_08_15_1_33_46_22174277.png)