Urban Planet: Spinning flywheels boost subways

We can only imagine the amount of energy it takes so send subways around the city. Here’s an article that has at least one solution taken from the days of steam engines. In order to capture braking energy, subways could use flywheels.

Urban Planet is a roundup of blogs from around the world dealing specifically with urban environments. We’ll be on the lookout for websites outside the country that approach themes related to urban experiences and issues.

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