
Why 2 degrees Celsius is climate change’s magic number
Clip: 12/2/2015 | 7m 28s
William Brangham offers some background on that climate science target.
We hear all the time that we need to stop the planet from warming an additional two degrees Celsius above pre-industrial levels. Why is that specific number so important though? And what happens if we exceed that limit? William Brangham offers some background on that climate science target.
Problems playing video? | Closed Captioning Feedback
Problems playing video? | Closed Captioning Feedback
Major corporate funding for the PBS News Hour is provided by BDO, BNSF, Consumer Cellular, American Cruise Lines, and Raymond James. Funding for the PBS NewsHour Weekend is provided by...

Why 2 degrees Celsius is climate change’s magic number
Clip: 12/2/2015 | 7m 28s
We hear all the time that we need to stop the planet from warming an additional two degrees Celsius above pre-industrial levels. Why is that specific number so important though? And what happens if we exceed that limit? William Brangham offers some background on that climate science target.
Problems playing video? | Closed Captioning Feedback
Where to Watch PBS News Hour
PBS News Hour is available to stream on pbs.org and the PBS app.
Providing Support for PBS.org
Learn Moreabout PBS online sponsorshipHow Zuckerberg and Chan just changed big charitable giving
Gwen Ifill discusses the move with Stacy Palmer of The Chronicle of Philanthropy. (5m 14s)
Mexican wind farm sending power to U.S. comes under fire
Special correspondent Jean Guerrero form KPBS Fronteras reports. (5m 10s)
San Bernardino attack suspects killed in police shootout
San Bernardino attack suspects killed in police shootout (6m 37s)
Providing Support for PBS.org
Learn Moreabout PBS online sponsorship
New Episode- News and Public Affairs

Today's top journalists discuss Washington's current political events and public affairs.

- News and Public Affairs

FRONTLINE is investigative journalism that questions, explains and changes our world.

New Episode
New Episode
New Episode
New Episode
New Episode
New Episode
New Episode
New Episode
Support for PBS provided by:
Major corporate funding for the PBS News Hour is provided by BDO, BNSF, Consumer Cellular, American Cruise Lines, and Raymond James. Funding for the PBS NewsHour Weekend is provided by...


