Plastic wastes is a global problem it is caused by human action.We would use less plastic bags for two reasons.First of all,reduce global warming because plastic wastes that take too long to decompose.For example,plastic bag we use in our everyday life take 10-20 years to decompose.Second,reduce flooding.For instance,if we use less plastic bags and throw rubbish in the provided trash can.Plastic bag will not blocked the drain.Therefore,we should use cloth bags instead of plastic bags for the earth.