Why are these articles are made up of plastic? Do they follow the 4R principle?
Plastics are easily mouldable i.e. can be shaped in any form. Plastic can be recycled, reused, coloured, melted, rolled into sheets or made into wires. That is why it finds a variety of application.
The following substances can be recycled and reused. Many such substances can also be recovered from waste dumps and can be then used after treatment. Hence, they follow 3 principles of the 4R principle.