Turning off things when they are not in use saves energy. Cutting down on the amount of garbage made or energy used. Turning off lights when you are not in the room helps to reduce. To use again especially in a different way. Old t-shirts as cleaning rags. Recycling is the way in which some waste materials can be made into new materials. The playground mulch was made from recycled. A large hole in the ground that is filled with garbage. The garbage man took our trash to the landfill.