• it is the art and science of applying sanitary, biological and scientific knowledge to improve and control the environment for the protection and health and welfare of the public. A, environmental awareness B, environmental sanitation C, environmental protection D, all of the above. • it is characterized by a high neurotrophin count. A, inflammatory lung disease B, obstructive lung disease C, chronic obstructive disease D, restrictive lubg disease • what is an example of chronic obstructive disease A, cold B, cough C, asthma D, toberculosis •it is characterized by the loss of lung compliance causing incomplete long expansion and increase long stiffness. A, respiratory tract infection B, chronic obstructive disease C, restrictive lung disease D, obstractive long disease • which of the following best describes the illnes "tonsilitis" ? A, a medically referred to as a viral respiratory tract infection B, inflammation or swelling of the sinuses C, information of the tonsil D,inflammation of the pharynx ​