Which of the following is a difficulty associated with environmental protection? a) cost . b) unpredictability . c) sustainability d) all of the above .

The answer is D.

The higher the cost of a particular approach to environmental protection the higher it is a deterrent to use. An example is the use of hydrogen batteries that produce water as a waste product.

Sustainability is the healthy balance in the production and use of a resource. It is usually difficult to find a sustainable environmental protection approach that is also not costly. An example of a sustainable approach is the planting of trees in afforestation and re-afforestation measures.

Due to the unpredictability of weather and climate, engaging long-term approaches to environmental protection can be challenging.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion