Acid rain is the direct result of acid released by burning fossil fuels.
a. true
b. false

The answer is A. It is true, acid rain is normally caused by the combination of sulphur dioxide and nitrogen oxide which are by products of burning fossil fuels. This is normally due to industrial air pollution. Places that are normally highly affected with acid rain, are places that are industrialized, e.g. China and Russia. Burning fossil fuels is a major cause of acid rain. Some activities such as electricity generation, factories and motor vehicle production are primary causes of acid rain.It is good to note that volcanic eruption is a natural phenomenon  that causes a concentrated acid rain.

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.