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People look at the exhibit to learn about the technology in minimizing noise pollution during the Zero Energy/Emissions Buildings exhibition at Science World in Vancouver, Canada, Oct. 9, 2019. (Photo by Liang Sen/Xinhua)
People look at the exhibit to learn about the technology in minimizing noise pollution during the Zero Energy/Emissions Buildings exhibition at Science World in Vancouver, Canada, Oct. 9, 2019. (Photo by Liang Sen/Xinhua)