Because of the process of compression and blackening, wherein as much air as possible is removed from garbage, it is difficult even for hot dogs or paper to decompose, let alone plastic.
因為目前垃圾掩埋場乾燥、黑暗、減少空氣含量的掩埋過程，連熱狗、紙都難以分解，更遑論塑膠了。