p.+74+Thinking+Globally+Section+Per+6+4.7

Water is essential to life Managing Freshwater is Really Important Around the World. Every Thing that Lives Need Water. 70% of the Earth Surface is Covered in Water. 98% of that Water is too Salty for Humans. 98% (3/4?) of the the freshwater is frozen in ice caps are Permanently Covering with Ice Water.

Water shortages are increasing The number of people on earth grows larger by the year, but the supply of freash water is not increasing. 31 counteries now face water shortages. Competitios for limited water supplace can result in comfilict since same rivers flow through many countries. when one country dams a river for irrigation water, it may reduce the amount of water flows in countries downstrem.

The climate change may shrink water supples In the last 25 years, Earth's climate has warmed slighty, and many scientists hypothesice that this warming trend will continue. Shift in climate can effect water supplirs. Some areas might getvless rainfall than they do today while others mightvexperience much rain and frequent flooding. If these changes occir, managing water supples will become more impontant than ever. Countries with shortager will need t improve their water collection and storage methods. On the other hand, those with too much water will need to improve their flood defenses.

Global warming- the gradual increase in the temerture of Earth's suface over time.

polluted- made unclean or impure; contaminated; tainted; slang

hypothesize- to form or assume something

1.How meny countries face water shortage? A.31 B.50 C.30 D.22

2.In the last 25 years, Earth's climate has what? A.wormed up B.stayed the same C.get colder

3.What percent of water is too saily for humans? A.98% B.80% C.88% D.100%