CNN CNN Newsroom Live August 21, 2015 06:41:00
We want to turn our attention now to climate change so far this year. 2015 has been the hottest year the world has seen. and now this past july has set a heat record also with these increased temperatures scientists are stressing the importance of one number. 2 degrees celsius. here's why. >>. >> reporter: 2 degrees celsius. it's probably the most important number you've never heard of. environmental policy experts say that temperatures, 2 degrees celsius, or 3.6 fahrenheit, may be the edge of the cliff for climate change. if global average temperatures were more than that, we will greatly up ...
Source: archive.org