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Red representative warns, the green represents environmental protection.Is mutual to contrast, express a problem not should evade.
Worldwide production of plastic grew by more than 500 per cent over the last 30 years.
Worldwide, approximately 5.8 million tons of PETwere collected in 2009.
Being recycled can reduce an energy usage.
Vanung University
Taipei, Taiwan
Cheng Wen-Han