A few months after its release, Google’s solar power evaluation tool is already being expanded throughout the US – a global roll-out must only be a matter of time. So, with that in mind, Project Sunroof was set up last August, taking advantage of Google’s immense global mapping. You can put in your average electricity bills and it will work out the savings, if any, behind going solar. “We at Google believe in solar energy,” explained Carl Elkin, a senior software engineer behind the project. “The solar industry needs our help.”Sunroof image via Shutterstock