Answer:
recycling. During the recycling process types of materials like plastic, glass, or aluminum are melted down and then reformed into new materials.
Some materials can be recycled many times, keeping them out of the landfill for a lifetime. About 75% of all aluminum produced in the United States is still in circulation today. Glass can be continuously recycled forever, being melted down and reformed into new materials.However, certain types of plastics such as PET are recycled into clothing, which cannot be further recycled. Thus, it's advisable to use plastics and dispose of them in moderation to limit the effect of this human activity on the Earth.