Using reusable shopping bags helps the environment. Less plastic used helps minimizes garbage in landfills, protects wildlife, and overall helps keep the environment clean.
Depending on the material, structure, and sunlight exposure to plastic, it can take anywhere from twenty to five hundred years to decompose. Plastics absorb UV (ultraviolet radiation) from the sun, and the sun breaks down molecules just like it does with skin. The process is called photodegradation. Landfills often expose plastic waste to the sun to accelerate the breakdown process of plastic.