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.
Posted July 11 2010 - 6:43 AM. I always hear the radio ads for the Wave ventilation system to expel damp air from the basement. I'm interested as I want something better than my dehumidifier. I did a search online and found the cost to be around $1700. I then found a post by a guy who made his own which I'm thinking of trying.