Desertification

Desertification - . – Medicines, resins, Drylands often...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Click to edit Master subtitle style 2/24/10 What is Desertificati …the process whereby productive land becomes so seriously eroded that any remaining soil
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2/24/10 The Human These include: poverty & over- population, To sustain themselves people: destroy forest belts, practice poor irrigation , use inappropriate agricultural methods Human acti vity often plays a major role in degrading land.
Background image of page 2
2/24/10 Some Wind erosion contributes to more frequent /intense hurricanes Stress on the world’s food-producing capacity air pollution
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2/24/10 Growing Problem Land degradation… increasing at a high rate. The UN Environment Program: estimates 250 million people are directly affected more than one billion are at risk. Drylands cover
Background image of page 4
2/24/10 Dry lands… actually quite the opposite . They are a vital source of biological diversity
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . – Medicines, resins, Drylands often conjure up images of unproductive land 2/24/10 Food Grains • Many of the most important food grains originate in drylands: wheat, barley, millet, & sorghum • Wildlife: (e.g.) large mammals and migratory 2/24/10 Canada’s Dryland • Only 5 to 7% of Canada’s land is suitable for agriculture , • and nearly 75% of it sits in the 2/24/10 Costs of Desertifica tion • United Nations estimates that desertification costs US$42 billion a year, • annual cost to prevent land degradation is estimated at only 2/24/10 Consequences of • It exacerbates poverty and political instability • Many suffer from water scarcity and famine • Children (especially girls) cannot attend school because they're forced to walk long distances...
View Full Document

This note was uploaded on 02/23/2010 for the course CHEM 107 taught by Professor Generalchemforeng during the Fall '07 term at Texas A&M.

Page1 / 9

Desertification - . – Medicines, resins, Drylands often...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online