Helium Balloon in Paris Displays Air Pollution Levels
Wednesday, July 9, 2008 - 16:14
in Physics & Chemistry
People in Paris won't have to look far to see the city's air pollution levels. A giant tethered helium balloon will display real-time reports of atmospheric pollution using an innovative lighting system, which can be seen from more than 20 km (12.4 miles) away.
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