Jim Hansen's letter to the Obamas

Jim Hansen (one of the first NASA scientists who pointed to the greenhouse effect in the 1980s) has written a 4-page letter to the Obamas which strongly advocates the following actions on climate:

1. Ban coal power plants without CCS
2. Introduce a universal carbon tax with 100% dividend
3. Speed up R&D of the 4th generation of nuclear power plants.

The letter is worth reading in its entirety.