There are 7days in a week. Like wise there are 7colours in a rainbow. The colours are violet, indigo , blue, green, yellow, orange, red these colours are the emission of rays. The splitting of white ray into seven colours through a rain drop. This is a property of reflection.
The garbage which is decomposable and non decomposable will be sort out and it will be turn out into manure which will be organic of no use it is decomposing slow practically and also kitchen waste is meagre again the earth worm which is formed in cluster from this decomposing manure harm the soil floor it erodes the surface and make a crack in building
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