Des journalistes farfelus et un Secrétaire général des Nations-Unies se plaisent à mettre la tragédie du Darfour sur le compte du réchauffement climatique.
La science démonte ces idées reçues... le Sahel reverdit:
For the last four decades there has been sustained scientific interest in contemporary environmental change in the Sahel (the southern fringe of the Sahara). It suffered several devastating droughts and famines between the late 1960s and early 1990s. the climatology of these droughts is unresolved, as is speculation about the effects of land clearance on rainfall and about land degradation in this zone. However, recent findings suggest a consistent trend of increasing vegetation greenness in much of the region. Increasing rainfall over the last few years is certainly one reason, but does not fully explain the change. Other factors, such as land use change and migration, may also contribute.
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