[/caption]In the past 100 years, our lifespan has increased by about 30 years. At the turn of the last century, the average lifespan was about 40-50, and today it is about 70-80. This is stunning. The reasons for this increase are numerous, including better medical care, improved sanitation, vaccines against deadly diseases, better diet, and education. One may well argue that some of these improvements are artificial (medicine can now keep a person alive with all sorts of tubes and resuscitation methods), but the point is that we are taller, healthier and heavier than we were a mere 100 years ago.
Do you realize the implications? If our lifespan increases by 30 years every 100 years, how is the earth going to support this massive growth in humanity?
[caption id="" align="alignright" width="300" caption="Image via Wikipedia"]
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