November 5 , 2020
                                                                          1825 days 
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	- Ammonia levels in the Yamuna river had reached nearly 3 parts per million (ppm)
 
	- It was almost six times above the acceptable limit of 0.5ppm, as per the Bureau of Indian Standards.
 
	- Ammonia is a colourless gas.
 
	- It consists of hydrogen and nitrogen.
 
	- It is used as an industrial chemical in the production of fertilisers, plastics, synthetic fibres, dyes and other products.
 
	- Ammonia occurs naturally in the environment from the breakdown of organic waste matter.
 
                                 
                            
                                
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