Carbon Neutral by 2050?

"Somerville to partner with emerging green-tech companies in effort to become carbon neutral by 2050" http://www.bizjournals.com/boston/blog/techflash/2014/10/somerville-to-partner-with-emerging-greentech.html Interesting read. Its great to see this type of commitment at a town level, how long until we see it at a state or national level???