Presentation on theme: "Eleanor McKnight, Nicole Petry, Marquis Dixon, Steven Cao"— Presentation transcript:
1 Eleanor McKnight, Nicole Petry, Marquis Dixon, Steven Cao DesertificationEleanor McKnight, Nicole Petry, Marquis Dixon, Steven Cao
2 A land slowly becoming a desert, usually due to human causes What is it?A land slowly becoming a desert, usually due to human causes
3 Causes of Desertification Overgrazing-People fence their animals, causing less space and more animals in one area.-People have a steady supply of food so they do not need to move as much to get resulting in overgrazing.
4 Extended periods of time with less than normal rainfall Extended periods of time with less than normal rainfall. It damages vegetation.DroughtWarWar causes refugees to move into marginal land. Because of this the new fresh land is destroyed.
5 Destruction of Plants in Dry Region People cut down trees to use them as fuel. Then, there is nothing left to protect the soil.A solution is to let average land replenish before farming
6 Farming of Average Land -Farmers clear average land and use it, taking way the richness of soil. By letting average land replenish before farming with can prevent this.
8 Soil being less usableThe soil can be blown away by wind or washed away by rain.Nutrients in the soil can be removed by wind or water.Salt can build up in the soil which makes it harder for plant growth
9 People near affected areas Desertification can cause flooding, poor water quality, dust storm and pollution.All of these effects hurt people living near affected region
10 Vegetation is lacked or damaged Loosened soiled may bury plants or leave their roots exposed.Also when overgrazing occurs, plants species may be lost.Drought and poor landmanagement contributeto famine.If the Population is growing,this will cause economic problems and starvation
11 Short term effects of Desertification in Sahel Soil loses its nutrients which makes it not usefulOvergrazing destroys vegetation and without it erosion occursLand becomes salty whichmakes it difficult to growcropsMap of Sahel
12 Long term effects of Desertification in Sahel People die of starvationCattle die of starvationThe soil becomes completely useless
13 Solutions Water Conservation Planting shrubs and trees “San d Fences” Through irrigation systems, water can easily access the wildlifePlanting shrubs and trees“San d Fences”Fences of wood that movethe sand into another areaThey help stop theaccumulation of a desertSet regulations on ff- road vehicles
14 Preventing Desertification Soil erosion must be prevented, which can be done by placing boulders and/or planting plants.Overgrazing of plants are damaging to the ecosystem and must be addressed.
15 Other NotesWater is absolutely necessary in order to green a desert and combat desertification. Careful irrigation is essential.It is almost always best that the local people combat desertification in their own areas as to be more efficient and less costly.People need to be given some kind of benefit for combating desertification.
16 China’s “Great Green Wall” Largest tree-planting program of its kind in the world.The “Wall” will get to 5,700 km by 2050400million hectacres42% of China’slandmass