Students cover their faces to avoid breathing in fumes in Causeway Bay as the city struggles with its pollution problem. Photo: Nora Tam Students cover their faces to avoid breathing in fumes in Causeway Bay as the city struggles with its pollution problem. Photo: Nora Tam
Students cover their faces to avoid breathing in fumes in Causeway Bay as the city struggles with its pollution problem. Photo: Nora Tam

Hong Kong must redouble efforts to rein in air pollution

Students cover their faces to avoid breathing in fumes in Causeway Bay as the city struggles with its pollution problem. Photo: Nora Tam Students cover their faces to avoid breathing in fumes in Causeway Bay as the city struggles with its pollution problem. Photo: Nora Tam
Students cover their faces to avoid breathing in fumes in Causeway Bay as the city struggles with its pollution problem. Photo: Nora Tam
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