That statement is true
Due to extreme amount of heat, the rain water that falls on the dessert will quickly be evaporated. To collect more of it, usually the roots of the dessert plants are really close to the surface
If the plants are close to each other, they simply won't be able to collect any water, so they spread evenly throughout the dessert
Smog. Im pretty sure smog is the only unhealthful air pollution on this list.
Provides evidence that human traits can be passed down genetically
