Please advise if the polybag (plastic bags) that they are us

The discarded plastic bottles and bags that pollute almost e empty plastic bags around us 是什么意思? If _____(shop)need plastic bags,they have to pay now in Chin If any comments are not clear,please do advise. You mustn't throw a____ the plastic bags everywhere after us plastic bags when you buy things,they (usually put)in plastic bags at the the disposable plastic bags has a lot of elements that （it）d The bags are not plastic ___paper ones,but reusable canvas b Are they this bags? they use paper bags,they don't use plastic bags.they use pap 英语翻译主要是“please be advised that for us”里的advise作什么解释啊？