what makes deserts a extreme environent?

Notes

My thinking

• they lose more moisture than they receive
• Mars is the only planet in the solar system on which deserts have been identified.
• the red color of many sand deserts is a result of the occurrence of laterite. Deserts may contain great amounts of mineral resources over their entire surface. This occurrence in minerals also determines the color.

• Why don’t people use deserts as a vast energy source?
• Why do people leave material from ghost towns un-touched?
• Why are many deserts popular for vacation areas