In a nutshell, Project Sunroof is an online tool that helps you determine if solar is worth the investment for your home. Yet another 20% project from a Googler that seems like it has potential to make a substantial impact in an area where we are long overdue for change. I know it’s still not quite economically feasible, but I wish there were some communities (or more, if some do exist) that required solar roofs for new construction. It may not be a cure-all, but every little bit helps.

On a related note, has anyone ever determined if there’s an 80/20 rule that applies to Google’s famed 20% projects? Do 20% projects account for 80% of their successful non-search/ads projects?