San Francisco streets are so dirty, the city is spending nearly $300,000 on trash bins that send a warning when they’re overflowing

San Francisco is installing sensors on 1,000 trash bins in an effort to curb littering and illegal dumping. The city’s downtown neighborhoods are filled with needles and garbage, creating conditions that many have compared to the world’s poorest slums.  The sensors help optimize waste collection by steering city officials in the direction of trash cans that are overflowing.

San Francisco’s streets are notoriously dirty.

In neighborhoods like the Tenderloin, Chinatown, and Mission District, it’s

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