Some of America's greenest universities and colleges are saving significant amounts of money by curbing their energy use, according to this article. Harvard is saving an estimated $400,000 a year since it installed efficient lighting in its parking garages, while Northeastern University in Boston replaced about 70,000 light bulbs around its campus with the goal of saving $1.2 million over six years. "By investing in energy-efficiency measures, schools can save millions of dollars over the long haul," Brian Wingfield writes.

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