دانلود رایگان پاورپوینت بیابان زایی و ساحل (انگلیسی)

Desertification and the sahel
THE myth
WHAT is Desertification? defining the term
Where and WHO? The Sahel belt: desertification made significant
Why should we care?
So WHAT… ABOUT DESERTIFICATION ?
The biophysical factors
Sea surface Temperatures and desertification
The human factor
Effect of desertification on albedo
The link between albedo and desertification
Move from causes to impact
The Impacts of Desertification
Soil Degradation and Lost Productivity
Effects of Lost Productivity on the Economy of Affected Countries
Impacts on the Enviroment of Surrounding Areas
Rainwater Use Efficency
Methods of Increasing Efficency

Move from causes to impact
We as humans are interdependent on the bio-sphere and its many micro-ecosystems. We support, rely upon, and are affected by the biosphere as much as we affect it. This type of interdependency can have positive outcomes, such as environmental sustainability and development, but it can also have potentially life and biosphere altering results. This is no truer than in the Sahel belt.