Below the mountains that overlook Hong Kong's financial district, drainage engineer Alex Lau is ankle-deep in water flowing into a giant tunnel almost twice the height of a double-decker bus.
source https://www.cnn.com/style/article/hong-kong-tunnels-climate-crisis-intl-hnk-dst/index.html
source https://www.cnn.com/style/article/hong-kong-tunnels-climate-crisis-intl-hnk-dst/index.html
Hong Kong's vast $3.8 billion rain-tunnel network
![Hong Kong's vast $3.8 billion rain-tunnel network]()
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