The world of nature is a ‘zero defect’ world. In it, there are all kinds of activities, but they do not produce any noise pollution. It has ‘factories’ operating round the clock but they do not produce any environmental pollution. There are many great industries, but they do not sully the water. The world of nature has been functioning for millions and millions of years, but without causing any deterioration or any accidents. All its parts are ‘active’, but we do not find anywhere that they have such a thing as a labour problem.