Enviro News Wrap: Refining Climate Models; Tar Sands and Carbon Emissions; Slow Start for the Chevy Volt, and more

Models of climate change for the next 40 years are becoming increasingly scary over time, suggesting a 3C rise in global temperatures by 2050. We all know that the Alberta tar sands produces super dirty oil, now there is yet another negative impact that is being tracked. And yet Obama still wants to build the Keystone XL pipeline all the way through the middle of the US, he wants to start the southern line as soon as possible.
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