Environtmental and Global Health

Archive for the ‘Climate Change’ Category

For environmental impact means the effect of a particular human action on the environment in its various aspects. The concept can be extended, with little use for the purposes of a natural phenomenon.

Human actions, motivated by the pursuit of various goals, cause side effects on the natural or social. While the intended effects are usually positive, at least for those who promote action, side effects can be positive and, more often negative. The environmental impact assessment (EIA) is the analysis of the predictable consequences of the action, and the environmental impact statement (EIS) is the previous communication, environmental laws require that under certain assumptions, the environmental consequences predicted by the assessment . Read the rest of this entry »

Human health is increasingly determined by environmental conditions (Rapport et al 1999, McMichael 2001). A report by the World Health Organization (WHO 1997) revealed the following:

* Deteriorating environmental conditions are an important factor contributing to poor health and low quality of life. Mismanagement of natural resources, excessive waste production and environmental conditions associated with health effects pose major challenges to sustainable development. Read the rest of this entry »

Over 20 million people are affected by water contamination by arsenic in Bangladesh. It is a major catastrophe comparable to Bhopal or Chernobyl. It happens far away in Bangladesh, and it happens every day when every inhabitant of the east or south Asian country drinks a glass of water, which is the same, the lethal dose of arsenic. Contamination of groundwater by this metal, a toxicity similar to lead, affects more than 20 million people.

The problem goes back almost 30 years ago, in those years came to Bangladesh several international aid agencies, with UNICEF in the lead, with the good intention of preventing infections caused by the consumption of stagnant water. The aim was to reduce the high mortality rate, especially the child, caused by diseases such as dysentery and cholera, and to do so beginning a massive program of construction of water wells. Read the rest of this entry »

Mengke Touming The glacier, one of the most beautiful in China and located in the northwestern province of Gansu, is melting the effect of climate change, reported the China Daily. ”

The Touming Mengke is the largest valley glacier in the Qilian Mountains in Sunan, but due to warming caused by greenhouse gases is suffering a reduction of six meters a year.

In the last five decades Touming Mengke, 10.1 km long and covers an area of 21.9 square kilometers, has been reduced by 300 meters.

Its maximum altitude is 5483 meters above sea level and the lowest is 4260 meters and is located in the valley Laohu, on the northern slope of the mountain Daxue, in the district of Subei. Read the rest of this entry »

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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The availability of energy from renewable energy sources is higher than conventional energy sources, but its use is restricted. Technological developments, the increase of social demand and lower installation cost and rapid depreciation, which encourages the use of a source of renewable energy sources in recent years.

Similarly, the challenges to sustainable development model and the change towards a sustainable development model implies a new conception of the production, transportation and energy consumption.

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Urban pollution in big cities and towns is one of the most important because it directly affects millions of people have an impact on the health and quality of life.

Environmental problems in urban areas and around this is a phenomenon that comes from the increasing urban growth and resulting environmental degradation. Changes in land use, and the concentration of the use of natural resources, is the cause of environmental problems.

It is for this reason that the urban system imports a large number of resources are transformed into goods and services and partly back into the environment as wastes and emissions.

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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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Reforestation not only plant trees where there are few or where it previously did not exist anymore. Afforestation involves a review of environmental and ecological balance is very sensitive and probably futile attempt or even damage the ecosystem. So which is the reforestation previous work that sets the most suitable tree species for the area, apart from the use of their wood.

It is important that does not end up being, for example, an invasive species that prevent the growth of native species will be lost due to insects or animals that eat them breaking the food chain. A reforestation will damage the ecological balance, already very sensitive and will happen as a row of dominoes (when you throw one, falling behind the more numerous).
Benefit of reforestation

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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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