instruction:
Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
question:
Question: Smog is a visible form of what? Answer: air pollution
answer:
Smog clouds the city of Los Angeles, California. Visible air pollution in the form of smog is a sign that the air is unhealthy.

question:
Question: Because force and electric field are what, they have direction as well as their value? Answer: vectors
answer:
Force and electric field are vectors and thus have direction as well as their value.

question:
Question: What type of disorders are caused by mutations in genes or abnormal numbers of chromosomes? Answer: genetic disorders
answer:
Many genetic disorders are caused by mutations in one or a few genes. Other genetic disorders are caused by abnormal numbers of chromosomes.