"Main causes" means the most important reasons why something happens.
For example, the main causes of global warming are:
What are the three main causes of corrosion?
The main causes for Benadryl allergies are allergies to animals, insects or pollen. Further to this, allergic reactions trigger allergens, making your immune system overact, meaning symptoms can occur from an allergic reaction to any substance.
What are the three main causes of corrosion?
The main causes of WARS is for property, power and authority
Main causes are water and the wind.
I believe the two main causes are loss of habitat and hunting.
The main cause is: HUMANS
The two main causes of renal artery stenosis are atherosclerosis and fibromuscular disease.
The main causes are greed, envy and poverty.
Erections
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the main causes for the land degradation in the punjab is theintensive cultivation.