Comments on: Climate Scientist Mann on 400 ppm CO2 https://gregladen.com/blog/2013/05/13/climate-scientist-mann-on-400-ppm-co2/ Sun, 30 Nov 2014 17:21:55 +0000 hourly 1 https://wordpress.org/?v=6.4.6 By: Beyond 400 PPM – Page 3.14 https://gregladen.com/blog/2013/05/13/climate-scientist-mann-on-400-ppm-co2/#comment-487012 Sun, 30 Nov 2014 17:21:55 +0000 http://scienceblogs.com/gregladen/?p=16584#comment-487012 […] dioxide molecules per million molecules of Earth’s atmosphere is an arbitrary but still significant milestone, reflecting a near 50% increase in the concentration of the greenhouse gas since humanity first […]

]]> By: Amoeba https://gregladen.com/blog/2013/05/13/climate-scientist-mann-on-400-ppm-co2/#comment-487011 Tue, 14 May 2013 13:49:49 +0000 http://scienceblogs.com/gregladen/?p=16584#comment-487011 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.

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