B)They are harmful to nearby neighborhoods.-|||-C)The rubbish in them takes long time to dissolve. D)The gas they emit is extremely poisonous.-|||-10.A) Growing population. B)Packaging materials.-|||-C)Changed eating habits. D) Lower production cost.-|||-11.A)By saving energy. B)By using less aluminum.-|||-C)By reducing poisonous wastes. D)By making the most of materials.-|||-12.A)We are running out of natural resources soon. B)Only combined efforts can make a difference.-|||-C)The waste problem will eventually hurt all of us. D)All of us can actually benefit from recycling.

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