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.
Addictions. Addiction is a condition in which the body must have a drug to avoid physical and psychological withdrawal symptoms. Addictionâs first stage is dependence, during which the search for a drug dominates an individualâs life. An addict eventually develops tolerance, which forces the person to consume larger and larger doses of the drug to get the same effect. Adapted from the Encyclopedia of Psychology.