1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 A small-to medium-capacity dehumidifier (11-25 pints) for a living room can run around $100-$250 or more, depending on size and features such as a humidistat to set the desired humidity, auto-shut-off when the tank's full, energy efficiency and quiet operation.
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