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.
If condensation seems to be the issue, then the excess water can often be the result of poor ventilation. If heating or air conditioning is unavailable in the basement, then the installation of a dehumidifying unit can be a simple fix that costs about $250. If the water pipes require insulation, then it will run between $50-$100. One of the most expensive problems to fix is crack in the foundation.