After the pigeons are fitted with pollution sensors, they are released into different parts of London. Londoners can then get live air quality readings via Twitter. Rich Preston/NPR hide caption

toggle caption Rich Preston/NPR
Pigeons Are London's Newest Pollution Fighters
  • Download
  • <iframe src="https://www.npr.org/player/embed/470809358/470861417" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
One Of The Nation's Biggest Urban Forests Isn't Where You'd Expect
  • Download
  • <iframe src="https://www.npr.org/player/embed/429911914/429911915" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

The Speck air quality monitor costs $200, but is available to all through Pittsburgh's public library system. Carnegie Mellon University CREATE Lab hide caption

toggle caption Carnegie Mellon University CREATE Lab
A Home Air Quality Monitor That Can Be Checked Out From The Library
  • Download
  • <iframe src="https://www.npr.org/player/embed/408786881/409309324" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
Burden Of Proof Hurt State In N.J.-Exxon Settlement, Some Say
  • Download
  • <iframe src="https://www.npr.org/player/embed/397823846/397891229" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Bayway Refinery in Linden, N.J., is one of two refineries that are involved in the settlement. It's no longer owned by Exxon, but they are on the hook for the cleanup. Joel Rose/NPR hide caption

toggle caption Joel Rose/NPR
Exxon Settlement Falls Short Of Damage, N.J. Democrats Say
  • Download
  • <iframe src="https://www.npr.org/player/embed/394029492/394099750" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

The abandoned Cherokee Clay and Brick Mine in Lee County, N.C., may become a landfill for coal ash. Dave DeWitt/WUNC hide caption

toggle caption Dave DeWitt/WUNC
After Toxic Ash Spill, Energy Company And Locals Struggle Over Solution
  • Download
  • <iframe src="https://www.npr.org/player/embed/393672334/393748218" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Journalist Chai Jing used $160,000 of her own money to produce a documentary on China's air pollution problem. Screenshot/Under the Dome hide caption

toggle caption Screenshot/Under the Dome
The Anti-Pollution Documentary That's Taken China By Storm
  • Download
  • <iframe src="https://www.npr.org/player/embed/390689033/390757840" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

A fisherman collects water on a beach littered with trash at an ecological reserve south of Manila in 2013. Francis R. Malasig/EPA/Landov hide caption

toggle caption Francis R. Malasig/EPA/Landov
8 Million Tons Of Plastic Clutter Our Seas
  • Download
  • <iframe src="https://www.npr.org/player/embed/385752248/385794002" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Lynn Good has had many mentors throughout her career — but few of them were women. "So I'm generationally on the early part of the ascent of women into leadership roles," the Duke Energy president and CEO says. Pat Sullivan/AP hide caption

toggle caption Pat Sullivan/AP
Duke Energy CEO: 'I Don't Think Of Myself As A Powerful Woman'
  • Download
  • <iframe src="https://www.npr.org/player/embed/357818516/357859581" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Xiang Zhengming plants rice seedlings in a field in southeast China's Fujian Province earlier this month. A newly released report says nearly 20 percent of the country's farmland is contaminated. Lin Shanchuan/Xinhua/Landov hide caption

toggle caption Lin Shanchuan/Xinhua/Landov