what do you understand by 4R principal
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The 4 R principle is:
4R means Reduce, Reuse, Recycle and Restore
Reduce - We must reduce the use of resources as much as possible and save them for the future generation. Reducing the usage is a method of conservation of resources.
Reuse - Resources can be reused wherever possible. We need not produce resources on large scale which may lead to exploitation of natural resources. Instead we can reuse them.
Recycle - Resources can be recycled wherever possible so that they can be used again and again.
Restore - We can restore resources into their original state, wherever possible.