“350 parts per million is what many scientists, climate experts, and progressive national governments are now saying is the safe upper limit for CO2 in our atmosphere.”
I would just like to add that after discussions with several friends in Alaska issues such as ocean acidification threaten Alaska’s sustainabilily managed SeaFood industry as well as many other parts of the world! It’s not just about climate change alone.
Reference:
http://ioc3.unesco.org/oanet/index.html
http://oceanacidification.wordpress.com/2010/02/01/anthropogenic-carbon-dioxide-emissions-and-ocean-acidification-the-potential-impacts-on-ocean-biodiversity/
Image shows predicted ocean acidification accelerating due to increasing carbon emissions:
