Former U.S. Sen. Rick Santorum greets voters this summer in Iowa. The Republican presidential hopeful has spent most of his professional life in politics.
Chip Somodevilla/Getty Images
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Sikh pilgrims stream into the Golden Temple in Amritsar, India, on Nov. 10. Devout Sikhs from all over India and the world come to Amritsar by the tens of thousands every day â adding to an already sizable carbon footprint. So city and temple officials have joined an environmental group to learn how to incorporate environmentally friendly practices.
Narinder Nanu/AFP/Getty Images
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The scarcity of ADHD medications is a problem faced by an untold number of children and adults with the disorder.
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Nathan Phillips looks at methane data plotted on a map of Boston streets on Nov. 17. Data from a mobile methane "sniffer" and a GPS show a real-time display of the gas levels in Google Earth. The orange spike in the center of the screen, on St. Paul Street, indicates methane levels about two or three times above normal levels, Phillips says.
Robin Lubbock/WBUR
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A Nissan Leaf charges at a station in Portland, Ore., that can recharge an electric car in 30 minutes. Electric cars could be an integral part of meeting 55-mpg fuel standards by 2025, but many consumers are put off by the vehicles' higher price and what some call "range anxiety."
Rick Bowmer/AP
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