In the wake of the COP 21 UN Climate Summit in Paris (see this recent Huffington Post piece for my take on the agreement), a number of important questions still remain unanswered.
2015 Selected Commentaries
The Huffington Post
The New York Times
With world leaders gathered in Paris to address climate change, most of the planet seems to have awakened to the reality that the Earth is warming and that we’re responsible.
The world can still avoid dangerous global warming if it acts fast.
It's probably the most important number you've never heard of: 2 degrees Celsius. That's when climate change starts to get especially dangerous.