Benzene is used mainly as an intermediate to make other chemicals, above all ethylbenzene, cumene, cyclohexane, nitrobenzene, and alkylbenzene. More than half of the entire benzene production is processed into ethylbenzene, a precursor to styrene, which is used to make polymers and plastics like polystyrene and EPS. Some 20% of the benzene production is used to manufacture cumene, which is needed to produce phenol and acetone for resins and adhesives.
The main symptoms of a chest infection can include: 1  a persistent cough. 2  coughing up yellow or green phlegm (thick mucus), or coughing up blood. 3  breathlessness or rapid and shallow breathing. 4  wheezing. 5  a high temperature (fever). 6  a rapid heartbeat. 7  chest pain or tightness.
Pneumonia is an infection of the lungs. People with pneumonia usually complain of coughing, mucus production, fever, shortness of breath, and/or chest pain. 1  The body's immune system usually keeps bacteria from infecting the lungs. 2  In bacterial pneumonia, bacteria reproduce in the lungs, while the body tries to fight off the infection.