Climate Scientist Mann on 400 ppm CO2

Climate Scientists Michael Mann, author of The Hockey Stick and the Climate Wars: Dispatches from the Front Lines, interviewed on Democracy Now:

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Features Michael E. Mann, author of The Hockey Stick and the Climate Wars: Dispatches from the Front Lines
You probably already know about Michael Mann's book, "The Hockey Stick and the Climate Wars: Dispatches from the Front Lines." The ongoing assault on climate science in the United States has never been more aggressive, more blatant, or more widely publicized than in the case of the Hockey Stick…
Michael Mann, author of some of the best books on climate science (including The Madhouse Effect: How Climate Change Denial Is Threatening Our Planet, Destroying Our Politics, and Driving Us Crazy, The Hockey Stick and the Climate Wars: Dispatches from the Front Lines, and Dire Predictions, 2nd…
Here's the press release: Mann to receive Hans Oeschger Medal from European Geosciences Union UNIVERSITY PARK, Pa. -- Michael Mann, professor of meteorology and geosciences and director, Earth System Science Center, Penn State, was awarded the Hans Oeschger Medal of the European Geosciences Union.…

Professor Mann Rocks. The threats and false accusations levelled at Prof. Mann and his colleagues are a true sign of the bankrupt nature of the pseudo-sceptics' deceitful and wholly bogus arguments. There has been a concerted effort to discredit Professor Mann, the perpetrators need to be caught and punished.

Prof. Mann's and his colleagues' 'Hockey-stick' has been amply validated, confirmed and extended by numerous subsequent studies.
For instance: http://www.skepticblog.org/2013/04/17/the-hockey-stick-slaps-back/

Dr. Mann is precisely correct that the Keystone XL pipeline must not be approved and that for it to be approved sends the wrong signal. The US is falling behind China in terms of renewable energy and that should be a cause for embarrassment. Renewable energy is desirable for many reasons including energy independence and not supporting objectionable foreign regimes.

As a species we need to reduce our impact, by numerous means, energy-efficiency, insulation, renewable energy, nuclear. All fossil carbon needs to remain in the ground.