Global warming is the phenomenon of rising average temperaturesrecorded in the atmosphere near the ground and oceans. Global warming began to worry after 60s, following massive industrial development and increasing gas concentration greenhouse that are considered largely responsable for this phenomenon. The main cause of global warming is increasing the concentration of CO2 in the atmosphere in recent centuries.
It was 280 ppm before the industrial revolution, is now 430 ppm, which is nearly double, and in 2035 would be 550 ppm, if the flow actual emissions of greenhouse gases would remain above natural absorption capacity. In addition to industrial development, another cause as important is the massive deforestation of forest. They lead to an increase in the concentration of pollutants, which cause global warming effect of ozone depletion. To curb these negative effects caused by deforestation, experts say it would take a forestation by 20 % compared to the total existing in the entire world.
Drought affecting large areas of southern Africa, Latin America, the Mediterranean, Middle Mjlociu and North Africa. Some studies predict for example that Amazonian forests could dry up simply by bringing ruin a huge number of species of animals and plants. Experts say that just happened 55 million years ago, the late Paleocene, when an increase of 5 degrees Celsius in average temperatures ravaged planet.
In order to save the species must adapt to these changes or to migrate with climatic zones.
Those species that can not adapt or migrate can not run the risk of disappearing due to climate change in their habitat. For example, species in mountain areas would have no place to move higher and colder areas which would lead to their extinction if they do not adapt. A similar situation will be recorded in the Arctic. Flora and fauna in the region can not move further north to avoid the risk of global warming and disappearing. Hot weather also can cause natural disasters. This could cause a fire, or maintain wildfires caused by human negligence. In this case, large areas of forest are destroyed, putting, also, threatening the lives of people nearby.
They also causing clouds of smoke in competition with good conditions of transport. The impact on food production, drought can have devastating effects on human health. This even more because drought is a phenomenon with great frequency in large areas of developing states with large population.
Insufficient food cause a higher level of mortality caused by a number of diseases, among which differ pellagra, iron deficiency anemia, hypocalcemia, hipomagnezia, low content in macro and especially micronutrients (vitamins, minerals), but and weakening the body’s resistance to pathogens.
Anemia, malnutrition, respectively effects of malnutrition are inadequate food consumption. About two billion people in developing countries are anemic development, and 1.1 billion people worldwide are malnourished. The frequency of malnutrition is also high in many regions of the world. It is estimated that the number of chronically undernourished people was, in 1996-1998, 792 million people, representing 18% of the total population of the regions concerned. To avoid a bleak future of the planet, should, by 2050, greenhouse gas emissions to fall twice and four times world to industrialized countries.