The advantage of this is that potentially poisonous items such as batteries, thermometers, and mirrors which contain mercury, can be dealt with separately, thereby avoiding hazards of pollution.
如此分類的好處之一，是方便有毒物品，如含有水銀的電池、溫度計、燈管、鏡子等集中處理，避免隨意丟棄，造成汙染。