Environtmental and Global Health

Archive for the ‘Global Warming’ Category

It is likely to produce changes in vegetation cover in the Arctic, which would have far-reaching implications.

1. The Arctic has three main vegetation types: polar deserts in the north, the boreal forests in the south and tundra in the middle. Is expected to increase in temperature favors the northward expansion of boreal forests, which travel to the Arctic tundra, and a preview of the tundra into the polar deserts.

2. The planned expansion of the forest will intensify global warming, as new woodlands will be darker and absorb more solar energy than the existing tundra. However, this effect could be partially offset by increased absorption of carbon from the atmosphere of the forest. Read the rest of this entry »

Arctic warming and its consequences have worldwide impact.

1. The amount of solar energy reflected back to space decreases with the thaw, which accentuates the warming of the surface.

2. The Arctic melt and increased rainfall in the region could provide fresh water to the oceans. This could affect ocean currents in the North Atlantic.

3. As warming progresses, the thawing of permafrost could release into the atmosphere as much greenhouse gases. Furthermore, the heating can stimulate biological growth, and therefore the absorption of CO2. The melting of glaciers can contribute to an increase in sea level. Read the rest of this entry »

The Earth’s climate is changing. During the last two centuries, the Earth’s surface temperature has increased an average of 0.6 °C. The observed warming over the last 50 years is attributed largely to human activity and, in particular the burning of fossil fuels.

Information on past climate conditions, obtained from ice cores and other methods indicate that the current increase in temperature around the world due to natural climate variability. The rise in temperature in the Arctic has occurred at a rate twice that of the rest of the world, and climate change is felt with particular intensity. Changes in arctic climate will also affect the rest of the world by causing an increase in global warming and sea level. Read the rest of this entry »

To forecast climate change, we need to make a projection of how the concentration of greenhouse gases will change in the future. A series of emission scenarios developed by the Intergovernmental Panel on Climate Change, IPCC, reflecting the different ways in which the world can be developed and their implications for humanity, economic growth, energy use and technology . There is new and stronger evidence that most of the warming observed over the past 50 years, is associated with human activities that lead to changes in the chemical composition of the atmosphere due to increased emissions of greenhouse gases and aerosols; however, the human influence will continue to change atmospheric chemistry by producing XXI century the average temperature and sea level will increase in the future.
An emission scenario is an acceptable and consistent, built to explain the potential consequences of the influence of human activities on climate. Although an increase in the observations give a better idea of global warming and other changes in the climate system, such as the decrease in the coverage of the glaciers, rising sea level, regional variations in precipitation patterns and changes in extremes weather and climate, these recent changes at the regional level, particularly the increase in temperature, have already affected many physical and biological systems. Brings social and economic growth effects related to regional climate variations, suggesting an increase in vulnerability to climate change.

According to the IPCC scenarios include 4 families: A1, A2, B1 and B2. In particular, the storyline and A1 scenario family describes a future world of very rapid economic growth, a population that peaks in mid-century and declines thereafter, and rapid introduction of new and more efficient technologies. Its most important features are convergence among regions, capacity building and increased cultural and social interactions, with a substantial reduction in regional differences in income per ca-pita. The A1 scenario family are differentiated by their technological emphasis: intensive use of fossil fuels (A1FI), use of energy from sources other than fossil fuels (A1T), or a balance across all sources (A1B), meaning by balanced situation in which not relying too heavily on one energy source, assuming that all sources of energy supply and all end-use technologies similar improvement.

Water pollution caused by human activities is an important environmental phenomenon, starts from the first attempts of industrialization, to become a widespread problem, since the industrial revolution began in the early nineteenth century.
Industrial production processes initiated at this time require the use of large volumes of water for the processing of raw materials, being the effluent of such production processes, discharges into the natural channels of water (rivers, lakes) with contaminated waste.
Since then, this situation is repeated in all countries that have developed industrialization, and even though the technology has somehow managed to reduce the volume and type of pollutants discharged into the natural channels of water, this has not occurred or the form or the amount necessary for the problem of water pollution is solved. Read the rest of this entry »

So what makes an ordinary rain becomes acid rain? This happens when the acidity of rain falls in reaction to common air pollutants, primarily sulfur oxides and nitrogen oxides. So when the rain water comes into contact with human pollution of the atmosphere, forms sulfuric and nitric acids. So the rain becomes more acidic yet, with a pH below 3.

What causes it? Human pollutants such as noxious fumes long run factories and power plants as clean energy from coal, gas or petroleum products. Vehicles also emit harmful gases which contribute their grain to the general pollution.
History of Acid Rain Read the rest of this entry »

Aquatic and terrestrial animals, trees and plants and even human infrastructure suffer the damaging effects of acid rain. It’s the fault of human beings, which emits nitrogen oxide and sulfur dioxide from factories, power plants, cars, etc.

Da effects of acid rain can become devastating, since the acidification of rivers, lakes and seas hamper aquatic life, to wear and death of plant life in forests.

To make matters worse, when acid rain falls to the ground, dragging the acidified water with natural fertilizers of the land, thus giving a total poverty, ending stressing the plants, since they remove their minerals and essential ions , thus producing more carnage.

statue degraded by acid rain But not only affects living things, but corrodes buildings and human infrastructure. For example statues and monuments made of marble or limestone, dissolve with each acid rain. Read the rest of this entry »

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.

Read the rest of this entry »

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.

Read the rest of this entry »

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.

Read the rest of this entry »