All Hail the Humble Solar-Powered Trash Bin

The solar-powered trash compactors that have appeared on the streets of Philadelphia and other cities can go 4 times as long as old-fashioned wire baskets before needing to be emptied, saving municipalities millions of dollars, according to CNN. Not only that, they send alerts when they’re full, making pickup much more efficient. Philadelphia was able to reduce the size of its trash-collection crews by 73% as a result.