Many disasters are either caused or exacerbated by environmental
degradation. Deforestation leads to rapid rain run off, which contributes to
flooding. The destruction of mangrove swamps decreases a coast lines
ability to resist tropical winds and storm surges.
The creation of drought conditions - and the relative severity
and length of time the drought lasts - is mainly a natural phenomena. Drought
conditions may be exacerbated by: poor cropping patterns, overgrazing, the
stripping of topsoil, poor conservation techniques, depletion of both the
surface and subsurface water supply, and, to an extent, unchecked urbanization.
Figure 1.6 Deforestation