"Climate Science is not Settled" - former Obama science official

Physicist Dr. Steven Koonin, undersecretary for science in the Energy Department during President Barack Obama's first term, writes in an article in the Wall Street Journal:

We are very far from the knowledge needed to make good climate policy ...

 Dr. Koonin covers all the key issues, what we know and most importantly what we don't know:

...  the crucial, unsettled scientific question for policy is, "How will the climate change over the next century under both natural and human influences?" Answers to that question at the global and regional levels, as well as to equally complex questions of how ecosystems and human activities will be affected, should inform our choices about energy and infrastructure.

But—here's the catch—those questions are the hardest ones to answer. They challenge, in a fundamental way, what science can tell us about future climates. ...

Koonin's article should be compulsory reading for all climate policy makers, especially the government ones.

[via FOS