PBS NewsHour

For more stories on New York State, check out The Innovation Trail.
Speaker John Boehner, R-Ohio, and House Minority Leader Nancy Pelosi, D-Calif., run into each other in the green room of weekly news conference in the Capitol Visitor Center’s Studio A, July 10, 2014. Photo By Tom Williams/CQ Roll Call...
Sao Paulo, Brazil. Photo by Flickr user Carlos Pereria The world’s urban population has ballooned to 3.9 billion — 54 percent of the total population — in 2014, the United Nations reported Thursday. By 2050, this proportion is...