5:54
What is COP21? - #COP21
Simon Clark
2:51
Why is 2°C the target for global warming? - #COP21
5:10
Why is global warming a big deal? - #COP21
1:49
The Earth has warmed before, why is global warming different? - #COP21
3:35
What needs to happen at #COP21?
4:29
What do climate scientists think will happen at #COP21?
2:53
Are climate scientists optimists? #COP21
5:52
Should geoengineering be considered at #COP21?
