Sha Tin, Hong Kong 17 March 2019: Top view of Hong Kong Sewage treatment plant

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• sewage
• industrial plant
• pollution
• industrial
• fabrica
• waste water
• environmental pollution
• dirty water
• aerial
• construction industry
• hongkong
• steel
• construction
• drone
• clean water
• storage
• waste
• hong kong
• treatment
• clean
• environment
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