Improved nutrition, medical treatment, sanitation, and safety have contributed to the dramatic gains in average life expectancy in the United States in the last 100 years.
Sanitation is the process of maintaining hygienic condition in the surrounding where one lives, safe disposal of human excreta, waste-water management and proper garbage collection as well as disposition. It is a necessary process to maintain a healthy disease-free lifestyle.
Life expectancy is a measure of the average age of an organism's life. The process is carried out by using statistical methods. The measure of life expectancy is essential as it tells about the conditions of the organism, their health and the challenges they face to maintain a healthy lifestyle.
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