Editor's note

More than 200 mayors have committed their cities to stick with the Paris deal no matter what the federal government does about climate policy. Amassing bigger fleets of electric vehicles could help these urban leaders make good on that pledge, explains environmental engineer Daniel Cohan.

Even though billionaires such as Warren Buffett and Donald Trump have expressed their fondness for fast food, its apparent cheapness has led some to assume that poor Americans eat out at places like McDonald’s and Kentucky Fried Chicken more frequently than others. Ohio State’s Jay Zagorsky and University of Michigan’s Patricia Smith put that assumption to the test.

Emily Schwartz Greco

Philanthropy and Nonprofits Editor

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Los Angeles Police Chief Charlie Beck, left, and Mayor Eric Garcetti pose next to an all-electric car in this 2015 photo. AP Photo/Nick Ut

Cities can jump-start climate progress by plugging in their vehicles

Daniel Cohan, Rice University

More than 200 mayors have committed their cities to stick with the Paris climate deal no matter what the US does. Electric vehicles offer a promising route to making good on that pledge.

Economy + Business

  • Do poor people eat more junk food than wealthier Americans?

    Jay L. Zagorsky, The Ohio State University; Patricia Smith, University of Michigan

    There's an assumption that the poor eat more unhealthy fast food because it's relatively cheap, leading some governments to try limit their access. Two researchers tested that assumption.

Environment + Energy

  • Climate change is shrinking the Colorado River

    Brad Udall, Colorado State University; Jonathan Overpeck, University of Arizona

    The Colorado River supplies water to millions of people and irrigates thousands of miles of farmland. New research warns that climate change is likely to magnify droughts in the Colorado Basin.

Science + Technology

Health + Medicine

  • Why the South still has such high HIV rates

    Thurka Sangaramoorthy, University of Maryland; Joseph B. Richardson, University of Maryland

    The number of new HIV-positive cases has sharply declined – in most parts of the country. Nonurban areas, particularly in the South, are showing sharp increases. Why?


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