【Six Swedish Girls at a Pump (High Test Girls】

Google is Six Swedish Girls at a Pump (High Test Girlshoping that some good old-fashioned peer pressure will push more people to embrace solar energy.

Project Sunroof, the search giant's solar panel mapping tool and calculator, is adding a nosy new feature, Data Explorer. Now, when you pull up an address using the tool, which visualizes how much sunlight hits each building in an area, you won't just see which roof is best suited to harness solar energy. You'll also be able to select an option to check out a map tracking every rooftop that's already outfitted with solar panels in the area.

SEE ALSO: China just built the world's biggest floating solar project

Seeing your neighbors with solar panels could make you much more likely to adopt them yourself. A study published by Yale economics professor Kenneth Gillingham found that people are much more likely to install solar panels if their neighbors had taken the plunge -- which means that we're all just trying to keep up with those green Joneses next door.

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"It happens at the street level, it happens within zip codes, it happens within states," Gillingham told The Atlanticin an interview about Data Explorer. "It seems to be a common feature of human decision-making that crosses many boundaries.”

Google's engineers built the tool by training machine learning algorithms to recognize solar panels, then applying them to the nearly 60 million buildings worth of data the tool has tracked since its expansion earlier this year. Buildings the algorithm IDs are tagged with a tiny red dot when you're zoomed in, while larger swathes of the map are analyzed by region.

Original image has been replaced. Credit: Mashable

The tool has identified roughly 700,000 solar installations in the U.S., which comes up short of the 1.3 million estimated by the Solar Energy Industries Association's (SEIA) count -- but like any good program, its creator says it needs some more data to improve.

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