Life expectancy facts for kids
There are great changes in life expectancy between different parts of the world, mostly caused by differences in public health, medical care and diet. Much of the excess mortality (higher death rates) in poorer nations is due to war, not enough food, and medical conditions or diseases (AIDS, Malaria, etc.).
Over the past 200 years, countries with African populations have generally not had the same improvements in mortality rates that have been enjoyed by other peoples.
There are also significant differences in life expectancy between men and women in most countries, with women typically outliving men by around five years. Economic circumstances also affect life expectancy. For example, in the United Kingdom, life expectancy in the expensive areas like Kensington is several years longer than in the poorest areas such as Glasgow. This may reflect factors such as diet and lifestyle as well as access to medical care. It may also reflect a selective effect: people with chronic life-threatening illnesses are less likely to become wealthy or to live in expensive areas.
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Life expectancy Facts for Kids. Kiddle Encyclopedia.