Over the past 20 years,life expectancy at birth has risen to more than 70 years in 146 countries,up from only 55 countries in 1990.An important factor in the increase in life expectancy in low-income nations has been the development of:

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Access to a safe water supply is crucial for reducing the prevalence of waterborne diseases, which disproportionately affect low-income countries. These diseases can cause premature death and greatly impact life expectancy. Improvements in water infrastructure have therefore contributed significantly to the increasing life expectancy in these nations. While the other factors listed (better doctor care, healthier diets, good exercise programs) are also important for overall health and well-being, they may not have had as significant an impact on life expectancy in low-income nations as improved access to clean water.

Over the Past 20 Years,life Expectancy at Birth Has Risen