【正确答案】In recent years, disposable plastic bags are widely used for shopping and other purposes. However, the excessive use of disposable plastic bags has resulted in a great damage to our environment. There is no denying that disposable plastic bag can bring us a lot of conveniences with its portability and low price. But the problems brought by disposable plastic bags are various, ranging from environmental to people's health. In the first place, it takes years for the plastic products to decompose and be absorbed by the soil, which causes severe white pollution. Secondly, the plastic bags can produce poisons in the case of high temperature which will do harm to people's health. It's encouraging that our government has imposed a ban on the use of disposable plastic bags officially. People may feel inconvenient in the first days when free plastic bags are no longer provided, but this is a necessary step toward environmental improvement.