Barrons AP Environmental Science

(B) According   to  the World   Health  Organization    (WHO),  heart   disease

killed 7 million people worldwide in 2011 and is currently the number one
cause of death worldwide. Contributory factors to heart disease include a
poor diet, lack of exercise, being overweight, high alcohol intake, and
smoking. Leading causes of death following heart disease (in order) are:
stroke, lower respiratory infection (includes pneumonia, flu, and
tuberculosis), pulmonary disease (includes asthma, emphysema, and
bronchitis), diarrheal diseases (mostly in children), HIV-AIDS, respiratory
cancer (lung, tracheal, and bronchial), diabetes, traffic accidents (3,500
daily), and prematurity.