By Herzstaub / Getty Images What if a sidewalk could store energy and power traffic lights to cover potential power outages? That's the innovative idea that an American city has put into practice. What if a sidewalk could store energy and power traffic lights to cover potential power outages? That's the innovative idea that an American city has put into practice. Particularly at risk from hurricanes, the municipality of Tampa (located in northwest Florida) is sometimes confronted with power outages. This is a major problem, which can quickly turn dangerous when it impacts road traffic, for exa…

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