Answer: coal burning factories and increased automobile usage has caused air pollution
Explanation:
<span>According to the national institutes of health, 65 percent of adult americans were overweight or obese in 2005, and 16 percent of american children were overweight.
The expert suspect that this number is caused by both the development of modern technologies that make the people tend to stay indoor with their gadgets rather than doing physical activities and the increase of junk food manufacturers.</span>
They will run to safety due to the risk
