Sealing air gaps a low-cost means of making home energy efficient

QUESTION: Our house is about 50 years old and not very energy efficient. We?d like to lower the cost of heating and air-conditioning, but can?t afford big-ticket improvements. Are there any low-cost ways to save energy and improve comfort?

Source: http://www.macon.com/2012/09/27/2192626/sealing-air-gaps-a-low-cost-means.html

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