Particulate matter, lead and other pollutants may play a role in the approximately 15 million babies born preterm every year around the world.
Researchers have determined that the Deformed Wing Virus has ravaged colonies worldwide. What's more, it's human activity that appears to have enabled that virus to spread.
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Kent Paterson is a freelance journalist who covers the southwestern United States, Mexico, and Latin America, and an analyst for the Americas Policy Program at www.americaspolicy.org.