Answer is Alcohol, and Tobacco, and followed by Marijuana.
It will help you.
Every seventh time a rat presses a lever, it receives food pallets.
Smoking causes coronary heart disease, the leading cause of death in the U.S. Smoking causes lung cancer and lung diseases including COPD, and Emphysema.
Alcohol can cause brain damage. Binge drinking can cause blackouts, memory loss and anxiety. Long term drinking can result in permanent brain damage, serious mental health problems and alcohol dependence or alcoholism.
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True. The left side of the heart receives oxygenated blood from the pulmonary vein and pumps it into the aorta, while the right side of the heart receives deoxygenated blood from the vena cava and pumps it into the pulmonary vein.
