Check windows and doors for drafts with a ribbon or feather. If it flutters, make or buy a draft dodger, or seal leaks with caulk and weatherstripping.
Click here for more information about the “draft dodger” and how to make one. You can achieve a similar affect by folding an old blanket to the appropriate size and placing it on the floor in front of the drafty door.
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Daily action from http://www.lcwr.org/lcwrsocialjustice/eoclentcalendar2010.pdf
Her Green Life 