Elvis Au Wai-kwong, deputy director of the Environmental Protection Department. Photo: Nora Tam Elvis Au Wai-kwong, deputy director of the Environmental Protection Department. Photo: Nora Tam
Elvis Au Wai-kwong, deputy director of the Environmental Protection Department. Photo: Nora Tam

Update outmoded waste treatment

Elvis Au Wai-kwong, deputy director of the Environmental Protection Department. Photo: Nora Tam Elvis Au Wai-kwong, deputy director of the Environmental Protection Department. Photo: Nora Tam
Elvis Au Wai-kwong, deputy director of the Environmental Protection Department. Photo: Nora Tam
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