Which of the following three R's are regarded as environment friendly? (1) Reduce, Rebuild, Restrict. (2) Random, Reduce, Recall. (3) Read, Register, Recall. (4) Reduce, Reuse, Recycle.
(4) Reduce, Reuse, Recycle. Explanation: The 3 R's of eco-friendly living are: Reduce, Reuse and Recycle. They all help to cut down on the amount of waste we throw away. They conserve natural resources, landfill space and energy.