before all of humanity is the most important task - maintaining the diversity of organisms living on Earth.All species (plant, animal) are closely linked.The destruction of even one of them leads to the disappearance of the interconnected with it other species.
Human impact on the nature of the Earth
From that moment on, as the man came up with tools to become more or less reasonable, started its full impact on the environment of the planet.The more developed a person is, the more influence it has on the Earth's environment.How man affects nature?What is positive and what is negative?
Negative points
There are pros and cons of human impact on nature.First, consider the negative examples of harmful effects on the environment:
- deforestation associated with the construction of highways and so on.
- Soil contamination occurs due to the use of fertilizers and chemicals.
- population declines due to the expansion of areas for the fields with the help of deforestation (animals, losing the normal habitat, die).
- destruction of plants and animals due to the difficulties of adapting to a new life, much altered by man, or simply the extermination of their people.
- air and water pollution, and various industrial wastes by the people themselves.For example, in the Pacific, there is a "dead zone" where a huge amount of floating debris.
examples of human impact on the nature of the ocean and the mountains, on the state of fresh water
change in the nature of a person under the influence is very important.Strongly affected the flora and fauna of the Earth, polluted water resources.
Usually, light debris remains on the surface of the ocean.In this regard, difficult access of air (oxygen) and light to the inhabitants of these territories.Numerous species of wildlife are trying to find new places for their habitat, which, unfortunately, not everyone succeeds.
annually ocean currents bring millions of tons of debris.This is a real disaster.
negative influence and deforestation on the slopes.They are naked, that contributes to erosion, as a result, loosening of the soil.And this leads to destructive landslides.
pollution is not only the waters of the oceans, but also fresh water.Every day thousands of cubic meters of river reach sewage effluent and industrial waste.
A groundwater contaminated with pesticides, chemical fertilizers.
terrible consequences of oil spills, mining
Just one drop of oil leads to the unsuitability of about 25 liters of water for drinking.But this is not the worst.Pretty thin film of oil covers the surface of a vast area of water - about 20 m2 of water.This is detrimental to all living things.All organisms are under a film doomed to a slow death because it prevents access of oxygen into the water.This is also a direct impact on nature of the Earth.
People mined minerals from the Earth, formed over millions of years - oil, coal and so on.Such industrial production, along with cars emit carbon dioxide in large quantities, resulting in a catastrophic decrease in the ozone layer of the atmosphere - the Earth's surface from the defender Deathdealer ultraviolet radiation from the sun.
During the period of the last 50 years the temperature on Earth has increased by only 0.6 degrees.But it's a lot.
Such warming would lead to an increase in temperature of the oceans, which will contribute to the melting of polar ice caps in the Arctic.Thus, there is the global problem - disrupted the ecosystem of the Earth's poles.Glaciers - is the most important and voluminous sources of fresh water.
Men use
It should be noted that people and bring some benefits, and considerable.
and I must at this point to note the influence of man on nature.Positive is the activities carried out by people to improve the ecology of the environment.
Many large areas of the Earth in different countries are organized protected areas, reserves and parks - a place where everything is preserved in its original form.It is the most reasonable human impact on nature, positive.In these protected places, people contribute to the conservation of flora and fauna.
Through their creation of many species of animals and plants are preserved in the world.Rare and endangered species has definitely entered into the man-made Red Book, which prohibits fishing for them and collect.
people also create artificial water channels and irrigation systems, to help maintain and increase soil fertility.
In large-scale events are held, and planting diverse vegetation.
Methods for problem solving in nature
to solve problems it is necessary and it is important in the first place an active human impact on nature (positive).
to save mineral resources necessary to improve their methods of production (in the depths when modern methods of extraction of fossil remains in the layers of metal ores 25%, over 50% oil and 40% coal), use them only as directed.
To solve the energy problems have to use alternative methods: wind and solar energy, tidal energy.
As for the biological resources (plants and animals), they should use (produce) so that in nature have always been individuals in amounts that contribute to the restoration of previous populations.
also need to continue to work on the organization of nature reserves and forest planting.
Implementation of these measures for the rehabilitation and improvement of the environment - the human impact on the nature of the positive.All this is necessary for the good of himself.
For the welfare of human life, like all biological organisms depends on the state of nature.Now the whole of mankind is the main problem - the creation of a favorable state of the environment and sustainability of life.
