World health organization suggests
that more than__of carbon dioxide
is harmful to environment. rifach
आरोग्य संघटनेनुसार वातावरणातील पेक्षा
जास्त कार्बन डाय ऑक्साईड चे प्रमाण पर्यावरणास
घातक असते.*
-
450ppm
O 400 ppm
350ppm
500ppm
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450 is answer
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