Imagine 73,387 trees planted or 394 cars taken off the road. That's roughly the equivalent of Wartburg College's 18 percent annual carbon-footprint reduction. Wartburg, Waverly, Iowa, invested $2.4 million in energy-saving projects, including a system that turns off various utilities when not needed, air conditioning in stages, restrictor valves that reduce water pressure and a "heat-recovery chiller" system. Annual savings include $270,000 in electricity costs and a 4.2 million gallon reduction in water usage. Wartburg's investment, which includes a $666,000 state grant from a federal energy program, will be paid off in eight years.
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