Savannas occur in hot tropical climates like northern Australia, India, Sub-saharan Africa, and northern south America. We have noticed that most savannas appear close to the equator and rain forests. They appear because there is not enough rain to support forests in tropical places. This has to do with the wind on Earth that carry rain.
Overgrazing is a problem on the savanna turning this biome to desert. Each year many acres of savanna is turned to desert areas, shrinking the distribution of savannas. Do you know why?
I'm not sure, but I'm guessing probably Global Warming.
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