Most metals can be recycled, including aluminum, steel, copper, brass, and stainless steel. To prepare metals for recycling, clean them of any non-metal components, such as labels or plastic parts, and remove any contaminants like food residues. For metals like aluminum cans, rinse them out to ensure they are free from liquid. Separating different types of metals can also improve recycling efficiency.

Most types of paper can be recycled, including newspapers, magazines, office paper, and cardboard. However, some exceptions include paper that has been contaminated with food, grease, or chemicals (such as pizza boxes or heavily soiled paper), and coated or laminated papers (like some glossy magazines). These materials can interfere with the recycling process and may not be suitable for recycling.

Recycling paper significantly benefits the environment by reducing the need for virgin paper production, which conserves trees and natural resources. It also decreases energy consumption and greenhouse gas emissions compared to producing new paper from raw materials. Additionally, recycling paper reduces landfill waste and minimizes the environmental impact associated with paper disposal.