ENST2002 Lecture Notes - Lecture 3: Overexploitation, Oomycete, Germination
24 Aug 2018
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Bio(cid:373)ag(cid:374)ifi(cid:272)atio(cid:374) defo(cid:396)estatio(cid:374) dese(cid:396)tifi(cid:272)atio(cid:374) p(cid:396)es(cid:272)(cid:396)i(cid:271)ed (cid:271)u(cid:396)(cid:374)i(cid:374)g fi(cid:396)e (cid:396)egi(cid:373)e adapti(cid:448)e management. 3 ways humans dominate the world gbk 2. Desertification is defined as the degradation of formerly productive land, and it is a complex process involving many causes, including climate change and misuse of the land. Many deserts are presently expanding into previously productive lands creating enormous drought and famine conditions. In ethiopia, sudan, and other countries in the horn of africa have suffered immensely with the expansion of the sahara desert into their farmlands. It is an increasing problem in the southwestern united states, in part due to human activities. Most notably, water is being moved in huge quantities into california, and people are moving into desert areas in vast numbers, all seeking water from limited groundwater supplies. This decreases water supply, vegetation, and land productivity. China estimates that the gobi desert alone is expanding at a rate of 2,460 km2/yr.
