Just as the Climate-focussed COP21 conference in Paris is drawing to a close, Google has expanded its Project Sunroof tool to cover more metro areas across the US. If you’re thinking of installing solar panels on your home roof, you can now check Project Sunroof in a number of metro areas in California, Massachusetts, Arizona, New York, New Jersey, Nevada, Connecticut, Colorado and North Carolina. Although no specific cities have been mentioned in the announcement, it’s safe to assume that any major cities in those states should now be covered…

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