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There are more uses of air cooled heat exchangers, like the upstream production, refineries and petro-chemical facilities. It can also be employed on situations rich in temperature, high pressure, corrosive fluids and environments. Moreover, air coolers could possibly be equipped and found in oil and coal refineries; compressor stations for gas pipelines; subsurface gas storage facilities; plants producing polychlorvinyl, polyethylene, glass fiber, biplastic; caustic soda plants; by-product coke plants and ammonia transportation and handling plants. Creative photo art projects around the Ugly Duckling, a children's book, can open students' eyes to seeing life within an entirely new way. In this lesson, students will photograph old, rusty, discarded and unusually placed items found everywhere. Using photo enhancing software, they're going to then develop a picture that can take what others may have seen as ugly, turning it into something beautiful. (Note: If the school doesn't have photo enhancing software, then Gimp, the industry free download, works extremely well.)