Hong Kong admits world's largest air purifier choked on debut
Hong Kong opened a long-awaited $4.6 billion tunnel under a 3.7 kilometre (2.3 mile) long section of the main island in late February with much fanfare. The bypass was greeted by traffic-weary residents with relief and heralded as a technological marvel because of its state-of-the-art air filter system.By April 09, 2019 at 04:07PM
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