The number of child deaths due to preventable causes is about 5 million a year in developing countries, or 50 million per decade. The number of life-years lost per child death is about 50 years, for a total of 2.5 billion life-years.

The number of children missing school is about 100 million. The equivalent life-years lost by missing school may be 2 years, for a total of 200 million life-years.

There are about 1.1 billion people in absolute poverty. The equivalent life-years lost by living in absolute poverty may be about 15 years, for a total of 17 billion life-years.

Thus, there could be 20 billion life-years / 40,000 life-years/character = 500,000 characters. The article has 2600 characters, thus there is potential for many more articles on these subjects.