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    Purple sea urchins are being turned into a delicacy to save kelp

    02:58
  • Earthquake in eastern Afghanistan kills more than 1,000 people

    02:21
  • Former energy executive charged in connection to environmental activist's murder

    03:12
  • How misleading labels are overwhelming recycling facilities

    03:46
  • Chris Martin talks introducing sustainability into Coldplay world tour

    04:56
  • Floods and landslides kill at least 91 people in Brazil

    01:52
  • How climate change is contributing to the sand shortage

    05:54
  • Watch: Divers complete dramatic whale rescue off Spanish coast

    01:27
  • Ukraine war must not derail curbs to climate change, John Kerry says

    01:21
  • New study finds pollution caused nearly nine million deaths worldwide in 2019

    01:36
  • Firefighters make progress on explosive Southern California fire

    02:44
  • Dozens of homes destroyed as enormous wildfire scorches Southern California

    03:13
  • CA attorney general investigates ExxonMobil for role in plastic pollution 

    04:14
  • Climate change and drought forcing hard choices across California (Part 1)

    02:24
  • Climate change and drought forcing hard choices across California (Part 2)

    02:42
  • Climber scales Mount Everest for 26th time, breaking his own world record

    00:38
  • Glass Half Full recycles bottles into a force for good in New Orleans

    01:35
  • Massive landfill fire sparks during Indian heat wave, impacting air quality 

    02:58
  • Interest grows for self-sustaining 'Earthship' homes made from recycled trash

    02:59
  • Cities look to beets to cut back on road salt use to protect environment

    03:31

Greenhouse emissions threaten polar bears

02:52

Steven Amstrup, Chief Scientist Polar Bears International and winner of the 2012 Indianapolis Prize, and Tom Smith, Scientific Advisor, Polar Bears International, spoke with NBC’s Anne Thompson about the environmental threat to polar bears.