[填空题]

{{B}} Plastic Bag Pollution{{/B}}
The use of plastic bags has increased at an alarming rate since they became popular in the 1980s. Big black bin liners, plastic carrier bags carrying advertising logos, clear sandwich bags and a variety of other forms. They’re lightweight, handy and easily discarded. Too easily discarded. Just take a look around you. Plastic bags can be seen hanging from the branches, flying in the air, settled amongst bushes and floating on rivers. They block up drains causing water and sewage to overflow and become the breeding grounds of bacteria that cause diseases.
Plastic bags are difficult and costly to recycle and most end up on landfill sites where they take around 300 years to decay. They break down into tiny toxic (有毒的) particles that pollute the soil and waterways and enter the food chain when animals accidentally consume them. But the problems surrounding wa

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