human influences are:
* they get warm, hot
* there's not enough water you can find
* its very sandy hard to drive
sahara
There is no Savannah Desert. The savannah is a semi-arid transitional area between a desert and a grassland. It is a different biome from a desert.
The desert biome, including the Simpson Desert, 'operates' quite well without human interference. Human activity is what causes problems, not the lack of it.
The only organism that puts trash in the desert is a human. The only organism that can remove trash from the desert is another human.
pollution
Deserts are a natural phenomena but human activity, such as over grazing and improper farming practices, can cause a desert to expand.
free time,money ,availability-it's difficult to play Golf or go swimming in the desert-peer group influences-interests and abilities.
Anything not human trash or construction is natural in the desert.
There is no such thing as the 'Savanna Desert.' The savanna is a grassland.
Pollution and the shape of lakes.
attention and care
Because its a park!