Introduction sur la deforestation pdf

Despite knowing the fact how important trees and forests are for the mankind, human beings are still continuing to cut down trees and clearing the forest land for building and construction. The subject of deforestation and the effects that it has on the environment have been heavily 3debated for a long time. Methodes destimation des surfaces cultivees par teledetection 5 5. Your introduction should pull the listener into your speech. Apr 29, 2012 deforestationthe effects of deforestation deforestation has many negative effects on the environment. Analysis of 650,000 satellite images, published in the journal science, reveal the extent of.

Introduction sur lestimation des surfaces cultivees 3 5. Do not say deforestation is a problem and we have to overcome it. How to give a speech on deforestation with pictures. Parc mikea study on historical deforestation and scenarios. Introduction of deforestation destruction of our green planet. Deforestation forests cover 31% of the land area on our planet they produce vital oxygen and provide homes for people and wildlife many of the worlds most threatened and endangered animals live in these forests 1. Basic concepts of deforestation, degradation, and fragmentation 2. There is a clear linkages between deforestation and worlds demands of fiber, food, and fuel understanding the underlying or indirect causes of deforestation is crucial to address redd and climate change most deforestation is driven from outside forestry sector e.

People believe that farming is the leading cause of deforestation because in the amazon, farmers are cutting down trees to make room for their cattle, livestock, and crops. Nevertheless, deforestation is a very big and important environmental problem which is yet to be effectively addressed. Indeed some 31 countries do not even make the list because they have already removed most of their forests and even if that remain are seriously fragmented and degraded. The dark areas are forest, the white is deforested areas, and the gray is regrowth. The changes in area of forest by region and subregion are shown in table 1. It has resulted in the reduction of indigenous forests to 4 5 of their preagricultural area. Sur ces vingt etdeux 22 participants, six 06 etaient des femmes, trois 03 des institutions. In many countries today, deforestation is an ongoing issue that is causing the extinction of animals and plants as well as the loss of homes of indigenous people who used to live there.

Trees are cut down in order to manufacture paper products as well as for livestock farming and so on. Deforestation has become a huge concern in todays life as there has been a rise in the decline of forests. Forests originally covered 40% of earths terrestrial surface, but extensive deforestation over the past 300 years has reduced this area substantially e. According to fao, deforestation is the conversion of. If your introduction is weak, it will act as a successful sleepinducer. Deforestation results from removal of trees without sufficient reforestation thisprocess alters the hydrologic cycle, altering the amount of water in the soil.

Tropical deforestation contributes as much as 90% of the current net release of biotic carbon dioxide into the atmosphere. The most dramaticimpact is a loss of habitat for millions of species national geographic. Tree roots pull water out of the ground and release it. Introduction sur les marches volontaires du carbone et les principaux standards.

Chinese premiers visit to latin america raises concerns about the impacts of mining, oil, agriculture and infrastructure projects. Earth has lost more than half a million square miles of forest between 2000 and 2012. The term does not include the removal of industrial forests such as plantations. Deforestation by a peasant farmer is often done to raise crops for selfsubsistence, and is driven by the basic human need for food. How to give a speech on deforestation with pictures wikihow. Causes, effects and control strategies 5 deforestation are maintained. Deforestation is consequently an important potential source of carbon. Deforestation is bad for the environment because animals lose their homes, trees are lost, and species are becoming extinct. Introduction of deforestation destruction of our green. According to norman myers, who published a book on the subject in 1979, the main causes of deforestation are excessive logging, slash and burn agriculture, cattle raising and harvesting for fuel. Deforestation and climate change congressional research service summary efforts to mitigate climate change have focused on reducing carbon dioxide co 2 emissions into the atmosphere.

Biodiversity islowered because animals that use the trees as a food or shelter source are unable to survivewithout them or may have to make serious. This change may represent as much as 20% 30% of the total carbon flux due to humans, i. Conclusion thus, deforestation is an important issue to be discussed. The causes and effects of deforestation will be covered in more detail in later modules. Concluding remarks there is a clear linkages between deforestation and worlds demands of fiber, food, and fuel understanding the underlying or indirect causes of deforestation is crucial to address redd and climate change most deforestation is driven from outside forestry sector e. Some of these efforts center on reducing co 2 emissions from deforestation, since. Deforestation deforestation regrowth undisturbed forest forest fragments figure 1.

Tree roots pull water out of the ground and release it as water vapor into the air. Jul 14, 2010 thus, deforestation is an important issue to be discussed. Deforestationintroduction to deforestationdeforestation is defined by as the cutting down and removal of all or most of the trees in aforested area. Wood has historically been the most dominant form of heating fuel, as well as one of the most often used building materials for houses and ships. Deforestation also disrupts the water cycle, which is the circulation of water between the earth and the atmosphere. Deforestation is the permanent destruction of indigenous forests and woodlands. Governments and large lumber companies see large profits in the mass deforestation.