Life expectancy is the number of years one is expected to live . It represents average life span of a new born and is an indicator of over all health of a country . It varies in different parts of the world due to the different conditions of health , care and nutrition .
SEX DIFFERENCE
Death rate in the women is less as compared to men .
It may be due to the following causes
Men are most commonly involved in tobacco smoking , alcoholism and drugs .
There are more chances of male death in car accidents and wars .
They have more tendency of suicide .
Women have better immunity than men .
CAUSES OF DECREASED LIFE EXPECTANCY
Obesity
It decreases life expectancy of about 3-9 months .
Cigratte smokingIt decreases life expectancy of about 13-14 years .
HOW TO INCREASE THE LIFE EXPECTANCY
Exposing yourself to sun and vitamin D .
Reducing obesity .
Reducing tobacco smoking .
Avoiding smoking in a closed space .
Eating healthy diet .
Avoiding junk foods .
Taking fruits and vegetables .
Regular exercise .
Indulging children into games and sports .
Taking regular sleep .
Relaxing yourself .
Stay optimistic .




