SHANGHAI -- Two Chinese companies have started trading in rainwater, the first commercialization of an unconventional resource in a move that authorities hope could support the country's "sponge city" projects.
Yuchuang Environment Engineering, a rainwater treatment company in Hunan Province, signed a deal to buy 4,000 cu. meters of water collected annually by Gaoxin Real Estate, another Hunan-based company, China Water Exchange announced on Dec. 16.
