Global Commons
Climate change: How much does it matter what we do?

What is global warming? How is there a threshold?

Is there sufficient evidence for elevated levels of atmospheric carbon?
How do we know what drives global warming?
Solutions to this situation.
Intergovernmental Panel on Climate Change, (IPCC) findings.
Abrupt climate change; the detailed risks.
Since climate change is a global problem, What can we really do?


Hansen, 2004

Hansen, 2006

Emissions 2013

Recent Global Warming