摘要
Human activity is now producing as much as50 million tons of plastic waste a year.This has caused many environmental issues,as this durable material is extremely hard for nature to decompose and break down-in a landfill plastic bags can last up to 500 years.As a result large amounts of garbage can easily accumulate over time.A solution to this problem is to substitute high-density polyethylene(HDPE)plastic packaging materials with biodegradable plastic materials.This will not only ease the pressure imposed on the natural environment,but
Human activity is now producing as much as 50 million tons of plastic waste a year. This has caused many environmental issues, as this durable material is extremely hard for nature to decompose and break down - in a landfill plastic bags can last up to 500 years. As a result large amounts of garbage can easily accumulate over time.
