give reason why :
a) dust and smoke are injurious to human life
Answers
Answer:
the dust and smoke goes in the body of human being through the nose due to this goes in the lungs and damage the various small parts of lungs hence the dust and smoke is harmful for human being
I) DUST..
the dust also irritate eyes , throat and skin HUMAN health effects of dust relate mainly to the size of dust particles . dust may contain microscopic solids or liquid droplets that are small enough to get Deep into the lungs and cause serious health problems. large particles may be irritate the nose and the eyes ....
ii) SMOkING
smoking causes cancer. Smoking stroke and coronary heart diseases, which are among the leading cause of death in the United States..... Smoking damages blood vessels and can make them thicken and grow narrower . this makes your heart beat faster and your blood pressure go up.. Clots can also form . ..... So, stop smoking