Deserts are a natural phenomena but human activity, such as over grazing and improper farming practices, can cause a desert to expand.
They happen as a result of the interactions between the laws of nature.
Certain astronomical phenomena are believed to be a result of the operation of natural lasers. If you mean man-made lasers: sure there are, on satellites and whatnot.
Since humans have been in existence, you probably would've heard that we can do some pretty damaging things to the environment. Deserts have been created in the past by us but most deserts these days where formed thousands even millions of years ago.
Karst topography
Days and years.
Days and years.
You can't, it is a natural phenomena that is a result of the way waves are. You can correct for it if you understand how it works, but there is no way to 'reduce' it. Also, you usually wouldn't want to, because it is extremely useful in many fields!
No, deflation results in the formation of desert pavement.
The moisture in a desert is a result of climate which is a result of geographic location. Man has virtually no control over these factors.
The result of the rust colored tint of desert landscapes are to show chemical weathering. This is shown on a map.
yes
Sand