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Creative photo art projects on the Ugly Duckling, a children's book, can open students' eyes to seeing life in the entirely new way. In this lesson, students will photograph old, rusty, discarded and unusually placed items found everywhere. Using photo enhancing software, they will then build a picture that can what others could have seen as ugly, turning it into something beautiful. A tighter built home means less outside air infiltrating in the home, which means less oxygen to use for combustion within the furnace. As the furnace burns fuel and oxygen for combustion, it "eats up" surrounding air, which has to be "made up" with fresh air. If air cannot type in the home as easily anymore, this can cause serious issues. As the surrounding air is utilized for combustion, rather than substituted with oxygen, a negative pressure inside the space can happen. This could create combustion problems for the furnace, plus burn up fresh air for anybody inside the home.