Absent

I was absent today and couldn't complete this blog post.

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Population Pyramids

Today we discussed population pyramids, a way to measure population while taking aspects like age and gender into consideration. In a population pyramid, men are on the left, women are on the right, the youngest are on the bottom and the oldest are on the top. The ages are separated into 5-year increments and grouped into pre-reproductive (0-14), reproductive (15-44) and post-reproductive (45-100+). We can predict future population trends by looking at the base of the pyramid. A large base points toward population increase, and a small base points toward a population decrease. Pre-industrialized countries tend to have larger populations because of the lack of availability of birth control, while developed countries tend to have steady population numbers or population decrease as people put off having children for later years or simply never have children. Pre-industrialized countries also usually don't have highways, great schools, or airports. This is because most of the state...
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