Biology 2014 JAMB Past Questions - Question 38: A constituent of the exhaust fumes from electricity generating sets which causes serious air pollution is

Correct Answer

A

Explanation

it combines with the hemoglobin in the red blood cells to form carboxyl hemoglobin. this reduce the ability of blood to transport oxygen round the body and this may lead to death. it can also release carbon iv oxide. increase concentration of carbon iv oxide in the air forms a layer over the earth's surface, trapping radiated heat. This is called green house effect which may result in global warming. The effects are rising of world temperature, melting of ice and snows leading to increased flooding. Ozone is the high oxygen molecule(03). These oxygen molecules are found in a layer of the atmosphere' called stratosphere which is about .5. to 50km'above the earth's surface. This layer also referred to as ozone layer, absorbs most of the harmful ultraviolet radiations from the sun. This absorption makes the temperature to rise. By absorbing, most of the solar ultraviolet radiations, the ozone layer protects living organisms on earth. If the ozone layer is perforated, the ultra violet radiations will reach the earth and cause high temperature causing skin burn, skin cancer and damage to the eyes.