Man_Society and Environment!

The Society is the groups of men with whom we interact and the set of sociocultural values, which have an influence on our lives.

The man is part of a social and historical organism. Man's conduct towards the environment is determined by social relations and how to produce to satisfy their needs, both primary (food, clothing, housing, etc..) as secondary. To access renewable natural resources (water, soil, air, climate, flora and fauna) or non-renewable (minerals and energy), requires knowledge and tools for development of farming, forestry, infrastructure, communications and Service. This knowledge and tools is called Technology and is a bridge between man and the environment or natural resources.

Technology has contributed to scientific progress and the development of new developments that give comfort to humans, but this in turn has caused problems such as increased demand for natural resources, environmental pollution by waste production and consumption, creation of new substances and emergence of new branches of production, intensification of agricultural production and urbanization.air pollution by releasing oxygen trees among other problems. Also, by increasing the population increases the number of factories, industries and automobiles, causing an increase in Smog, which affects human health as it inhibits the replenishment of oxygen in the blood supply. (Time medicine: Enviroment V. Man, 2009). For example, if building a railroad, a forest is cleared, causing changes in climate and hydrological cycle, the flora and fauna disappear, increasing the temperature and decreases the degree of moisture is lost to purifying function

Negative actions of human activity on the environment are evidence of the accelerating growth of social influence on this. The society, in general, it is known that environment, how to achieve development without damaging what nature gives her and what is the importance of environmental education.

For more information, visit this link:

http://www.time.com/time/magazine/article/0,9171,897616,00.html

Noise Pollution

According to the Australian Academy of Science, “Noise pollution can be defined as any unwanted or offensive sounds that unreasonably intrude into and disturb our daily lives”. The noise pollution, is an undesirable sound of any intensity, which interacts and interferes with human beings and that always causes uncomfortable and unpleasant sensation.

There are three sources of noise generators:

1. Natural Sources: noise where no human hands involved, for example, thunder, volcanoes, blizzards, cataracts, among others.

2. Point Sources: As equipment and industrial machinery, equipment and appliances, among others.

3. Mobile Sources: Noise from motor vehicles and airplanes, automobiles, trains, motorcycles, among others.

The industrial and urban growth has influenced the generation of noise, and for this reason it is considered one of the factors that produce effects on health of living beings.

Noise damage is not limited to the ear. The hearing, and a communication function with our environment and our fellow, is also a warning system linked with other organs. For this reason, excessive noise exposure can trigger side effects: rapid pulse (tachycardia) and elevated blood pressure, increase respiratory rate, increased stomach acid secretion and secretion of adrenal hormones, difficulty concentrating, restlessness, irritability, sleep disturbance and fatigue. Noise is a risk factor for the health of children and adversely affects their learning. When they are educated in a noisy environment become less attentive to the sound signals, and are disrupted in their ability to listen and a delay in learning to read. Verbal communication difficult, favoring isolation, lack of sociability and also increases the risk of stress. According to the website greenliving, “Noise disturbs feeding and breeding patterns of some animals and has been identified as a contributing factor of the extinction of some species”. In the case of owls and bats, they are guided by the sound to find and hunt their prey. Laboratory studies have shown that bats avoid hunting in noisy areas.

For more information, visit this link:

http://www.greenlivingtips.com/articles/215/1/Noise-pollution.html

Water Pollution

According to the American College Dictionary, pollution is defined as: “to make foul or unclean; dirty”. Water pollution occurs when a body of water is adversely affected due to the addition of large amounts of materials to the water. When it is unfit for its intended use, water is considered polluted. There are several classes of water pollutants. The first are disease-causing agents. These are bacteria, viruses, protozoa and parasitic worms that enter sewage systems and untreated waste. A second category of water pollutants is oxygen-demanding wastes; wastes that can be decomposed by oxygen-requiring bacteria. When large populations of decomposing bacteria are converting these wastes it can deplete oxygen levels in the water. This causes other organisms in the water, such as fish, to die. A third class of water pollutants is water-soluble inorganic pollutants, such as acids, salts and toxic metals. Large quantities of these compounds will make water unfit to drink and will cause the death of aquatic life.
Another class of water pollutants are nutrients; they are water-soluble nitrates and phosphates that cause excessive growth of algae and other water plants, which deplete the water's oxygen supply. This kills fish and, when found in drinking water, can kill young children. Water can also be polluted by a number of organic compounds such as oil, plastics and pesticides, which are harmful to humans and all plants and animals in the water. A very dangerous category is suspended sediment, because it causes depletion in the water's light absorption and the particles spread dangerous compounds such as pesticides through the water. Finally, water-soluble radioactive compounds can cause cancer, birth defects and genetic damage and are thus very dangerous.

The Water is the most important for every human being, resource for each living organism that inhabits our planet. It’s important to create environmental awareness in the new generations in order to preserve, because without this resource not have life on our planet.

For more information, see this link

http://www.explainthatstuff.com/waterpollution.html