The use of microbial products in a commercial setting has become very popular due to the environmentally friendly aspects of this process. the products so-produced, are readily degraded, non-toxic, and typically result

Typically result from enzymatic metabolism.

Explanation:

Many microorganisms are used in various branches in the commercial sector, from manufacturing food products to promoting cleanliness in a contaminated environment. These microorganisms promote a cheap action and without degrading nature, because naturally, through their enzymatic metabolism can create biological products of great economic value for humanity.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.