Helium Balloon in Paris Displays Air Pollution Levels »
Posted By creativeblister 2 months, 4 weeks ago in Science & TechnologyPeople 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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