The Sahara is a sandy desert with giant sand dunes. It covers over 3 million square miles of Africa. Other major deserts include the Arabian Desert in the Middle East, the Gobi Desert in Northern China and Mongolia, and the Kalahari Desert in Africa. Go here to learn more about the World's deserts.he Sahara is a sandy desert with giant sand dunes. It covers over 3 million square miles of Africa. Other major deserts include the Arabian Desert in the Middle East, the Gobi Desert in Northern China and Mongolia, and the Kalahari Desert in Africa. Go here to learn more about the World's deserts.
Addiction is a persistent, compulsive dependence on a behavior or substance. The term has been partially replaced by the word dependence for substance abuse. Addiction has been extended, however, to include mood-altering behaviors or activities.
Addiction is often now defined as âuncontrolled, compulsive useâ; if there is no harm being suffered by, or damage done to, the patient or another party, then medically it may be considered compulsive, but to the definition of some it is not categorised as âaddictionâ.n the past addiction was term that clearly referred to the use of a tolerance-inducing drug in sufficient quantity as to cause tolerance (the requirement that more of a given drug must be used to produce the same effect as time passes).