C is the answer to question 22
Ammonia A ..... c,b,d all come from crude oil
Forests capture and store water and can play an important role in providing drinking water for millions of people in cities,villages and towns.Forest contribute to the reduction of water-related problems like floods by absorbing water through their roots and storing it in the ground.
The vast pollution which occurs globally can have a significant impact on air quality on a local scale. The reason for this is quite simple: polluted air can easily get trapped beneath a cloud cover, or be literally "blown" away to other locations, and when much polluted air gets accumulated, it can have devastating heath effects on a local population, not just to humans, but to animals and plants as well. Overall, the vast global pollution can effect the smallest of regions on an unprecedented scale.
The increasing amount of usage of sexual protection.
