Environtmental and Global Health

Archive for the ‘the Problem of the Earth’ Category

Between 19 and 23 kilometers above the earth in the stratosphere, a thin layer of gas, the ozone layer, surrounds and protects the earth from harmful solar rays.

Ozone is produced by the effect of sunlight on oxygen and is the only substance in the atmosphere that can absorb harmful ultraviolet radiation (UV-B) from the sun. This thin layer makes life possible on Earth.

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Earth’s atmospheric greenhouse effect associated with radiation processes going on inside. radiation is a form of energy, and is transmitted only in a vacuum.

Other forms of energy transmission in the natural environment are conduction and convection. In conduction heat spreads through the solid (propagation of heat from the surface soil to a lower level). In a fluid (gas and liquid) heat transfer by convection process through which a relatively warm part of the fluid, moving, and then mixed and integrated into a relatively cool environment.

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Light pollution caused by inefficient use of Towards the sky and poorly designed lighting, which sends light into areas where it is not necessary: it. The use of projectors and laser weapons, advertising uncontrolled lighting, and lack of rest period decorative lighting that also helped to produce this problem.

We must warn that there is also light pollution by using excessive light intensity, and / or ratings that do not need to carry out activities under the area illuminated.

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Freshwater pollution problem known since antiquity. One of the first historical evidence is the story of Scripture on one of the ten plagues of Egypt, which describes the transformation in “blood” from the Nile river water, a biological phenomenon because of contamination caused by microorganisms.

With increasing population and the emergence of industrial water pollution of rivers, lakes and even ground water continues to rise. Pollution caused by domestic and industrial waste, deforestation and land-use practices, significantly reduce the availability of water that can be used.
WHO and water pollution

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Air pollution is a mixture of solid particles and gases in the air. Emissions from cars, chemicals from factories, dust, pollen and fungal spores can be suspended as particles. Ozone, a gas, is a key component of air pollution in cities. When ozone air pollution is also called smoke.

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Increasing temperatures will lead to increased rainfall, but the effect is less clear on the storm. Extra-tropical storms partly depend on the temperature setting, which would weaken in the northern hemisphere as the polar regions warmer than the rest of the hemisphere, this would lead to low rates of melting ice and increased the cycle all over the world.

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There are many potential impacts of global warming than hypothetically affect the environment and human life according to the theory of global warming. The main thing is the average temperature increased gradually.

From here, there are a number of different effects such as rising sea levels, changes in agricultural ecosystems, the spread of tropical diseases, the increasing intensity of natural phenomena. Some of this phenomenon will produce today, but it is difficult to determine a direct relationship to global warming.

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Earth’s climate is very difficult to predict, because there are many factors to consider: rain, sunshine, wind, temperature … So you can not specify what the effects would cause global warming. But it turns out, can be very severe climate change.
The first consequence, it is possible, is the improvement of drought: in some places less rainfall. On the other, the rain will increase, causing flooding.

Warmer atmosphere can cause the ice near the poles are melting. The amount of water would raise the sea level. Increased by only 60 cm would inundate fertile soil in Bangladesh, India, among them hundreds of thousands of people depend on for food. tropical storms may occur more frequently.

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Introduction to biological, chemical or physical to the half outside. Any undesirable change the natural composition of the medium.

Lands
Wetlands (marshes, mangroves) is one of the ecosystems that produce more alive. Therefore, a large ecological importance and the danger disappeared. Overall assessment of the first revealed that more than 1,200 million hectares (equivalent to the combined areas of China and India) have experienced a serious degradation in forty-five years, according to data from the World Resources Institute.

Waters
Contaminate water is life itself. The entire life cycle, reproduction and human food, animal and marine who is affected. Currently, all the oceans of the world affected by oil spills. Almost every year, spilled into the sea 3.5 million barrels.

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One problem that seems to be given some advantage in the international opinion is whether or not we even have time to reverse the effects of greenhouse gas emissions are causing our global climate.

Here, climate change across the planet, except for natural disasters such as the fall of meteorites 365 million years ago caused the sudden change – they grow naturally a very gradual, ie they have to spend more than 100 lives a man to see only small changes.

Cycle of the earth have many years to someone who could barely understand, because we can not have a clear understanding of what they mean two or three million years, when we live only 100.
However, both by advances in technology and how they developed society, we have the ability to accelerate the process, change and even to overcome the planet’s remarkable ability to absorb and distribute these changes, adapt to their own time.

Planet since its inception has never failed to mutate from the time of the coldest ice, but the heating stage. However, this change is always a “slow” that no living creature must have sensed.

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