...and a formidable job to do.DATA FROM an aerial remote sensing test carried out in the early 1980s showed that there were some 4,700 rubbish heaps over 50 meters in diameter around Beijing. A later...
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...and a formidable job to do.DATA FROM an aerial remote sensing test carried out in the early 1980s showed that there were some 4,700 rubbish heaps over 50 meters in diameter around Beijing. A later...