Learning to Explore the Environment (continued)

In addition to material removal, environmental degradation can also occur due to other factors.

If too many substances are introduced into the environment, even if they are not foreign but overload the cycles, pollution will result. An environment becomes polluted when it undergoes changes large enough to harm the beings living there in equilibrium.

Man, like any living being, disposes of its waste where it is. Under natural conditions and quantities, this material would be recycled and used by the other components of the environment. However, because of industrial activities, man introduces a large amount of foreign substances into the environment.

Therefore, the environment is overloaded and the recycling of materials changed. These harmful substances, discharged into the air, soil and water, spread to the most varied corners of the earth, harming man himself.

Concentration of gases from cars and factories can cause respiratory illness; Improperly treated sewage contaminates water that, when ingested or used for irrigation, can cause infection and favor parasite development. Chemicals used in the manufacture of numerous products, such as insecticides, herbicides and fertilizers, are continuously released into the soil, water and air; they can be absorbed by plants and can be introduced into animal and human organisms alike. Many of these substances are toxic, and their accumulation causes a number of disorders, illnesses and even death.

It is therefore necessary to properly treat waste so that it does not harm the environment and can be reused by nature. Water and sewage treatment plants, industrial filter facilities, refuse plants are some examples of measures that man can and should use.