Pyramids can give insight into trends in population over time. For example, it can tell if the population will rapidly increase or decrease. on the graph youngest is on bottom and oldest on top female on right male on left.
http://www.fsl.orst.edu/pnwerc/wrb/Atlas_web_compressed/5.Human_Populations/5h.pyramids_web.pdf
Artie, only one of these looks like a news story. Did you search these topics using the news links I provided?
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