The cause of the drought.
1. Naturally
1.1 Climate change
1.2 Climate change
1.3 Changes in sea level
1. Naturally
1.1 Climate change
1.2 Climate change
1.3 The change of the sea level
2. By Human Action
2.1 The destruction of the ozone layer
2.2 The impact of the greenhouse
2.3. Development of industrial
2.4 The deforestation