Name the chronic respiratory disorder caused mainly by cigarette smoking.

Emphysema is the chronic respiratory disorder caused mainly by cigarette smoking.Respiratory acidosis is a condition that occurs when the lungs cannot remove all of the carbon dioxide the body produces. This causes body fluids, especially the blood, to become too acidic.Respiratory alkalosis occurs when you breathe too fast or too deep and carbon dioxide levels drop too low. This causes the pH of the blood to rise and become too alkaline.Asthma is a difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles.