The following factors would contribute to environmental p...
The following factors would contribute to environmental pollution except
production of ammonia
manufacture of cement
photosynthesis
combustion
Correct answer is C
Photosynthesis is the process of food-making in plants, it doesn't have any by-products that pose a threat to the environment. Infact, the plants use our waste product of respiration (Carbon dioxide) and uses it for the photosynthetic process and gives off oxygen as by-product.
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