Cancer, heart disease, and conditions related to obesity have proved difficult challenges even to the best health systems. Meanwhile, cancer has become a leading cause of death in countries with high levels of pollution and relatively long life expectancy.
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Answer:
Cancer, heart disease, and conditions related to obesity have proved difficult challenges even to the best health systems. Meanwhile, cancer has become a leading cause of death in countries with high levels of pollution and relatively long life expectancy.
Explanation:
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