Biosfera. Tabiiy resurslar, ulardan oqilona foydalanish va atmosfera muhofazasi. Suv

Threatened Species If a species is likely tobecome endangered in the near future, it is classifiedas a threatened species. The Australian koala, shownin Figure 8, is threatened. People once hunted koalasfor their fur. In the 1930s, people realized the koalawas in danger. Laws were passed that prohibited thekilling of koalas, and the koala populations began torecover. Koalas rely on certain species of Australianeucalyptus trees for food and shelter. After the 1930slaws were passed, Australia‘s human population grewand the koala‘s habitat began to disappear. By the year2000, nearly two-thirds of the koala‘s habitat hadbeen lost to logging, agriculture, cities, and roads.

Nazorat savollari:

1. 
   Hayvonot dunyosining qanday ahamiyati bor?
   
2. 
   O‗zbekiston hayvonot olamida qancha tur hayvonlar bor?
   
3. 
   O‗zbekistonda hayvonot olamini muhofaza qilish borasida qanday ishlar olib borilmoqda?
   
4. 
   O‗zbekiston hayvonot olamida qanday turlar yo‗qolib ketgan?
   

FOYDALANILGAN ADABIYOTLAR:

1. 
   Peter Rellero, Dinah Zike. Ecology. USA, Glencoe. 2005. 132, 143-bet
   
2. 
   O‘, Xo‘janazarov, M.Mirsovurov, T.Norbobayeva. Ekologiya va barqaror taraqqiyot ta‘limi. T.: Navro‘z. 2014. 85-88-betlar
   
3. 
   Ergashev A. ―Umumiy ekologiya‖ T, ―O‘zbekiston‖ 2003 y. 86-109-betlar.
   
   1. 
      To‘xtaevA.S. ―Ekologiya‖. T, ―O‘qituvchi‖, 1998 y.74-90-betlar.