Wanda Butts was named one of the top 10 CNN Heroes of 2012 . Her group has helped teach more than 1,200 Ohio children how to swim . TL;DR A new study shows that kids who are exposed to water pollution have a higher risk for developing asthma and other respiratory problems later in life. Who should be the CNN Hero of the Year ? Cast your vote now !
Wanda Butts was named one of the top 10 CNN Heroes of 2012 . Her group has helped teach more than 1,200 Ohio children how to swim . Most of the children are minorities , which have higher drowning rates than whites . Who should be the CNN Hero of the Year ? Cast your vote now !