Description of how human activity has influenced savanna?

The Human activies on the savanna has reduced the size of the natural land. The villiges and towns have cleared part of the savanna for houses and streets and gardens, which takes away many of the nutrients out of the ground and not allowing the natural biome to grow back. Humans have taken the many savannas and because of our activities turned much of it to desert. most likely in the future the savanna will be no more. with the way we clear it and the pollutants we put into the environment the savanna will be reduced to nothing.