Which is a disease of the respiratory system, often caused by smoking? a) emphysema b) atherosclerosis c) idiopathic edema d) thalassemia

How do nicotine and tobacco cause cancer? by decreasing blood-sugar levels by damaging or changing a cell's dna by increasing heart rate by increasing phlegm and mucous production

Taking a foil acid supplement during childhood can prevent illness

Ineed an essay 1200words about obezity ,introduction,main causes,conclusion