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According to results of a recent study, people underestimate children’s willingness to eat healthy foods. While previous studies have shown that students prefer fatty foods and that healthy meals cost schools more, a group of economists from the University of Minnesota found that schools serving healthier lunches did not see a falloff in demand. In addition, the higher labor costs associated with preparing the healthy meals was offset by the lower cost of healthy ingredients like fresh fruits and vegetables. Childhood obesity is considered a growing “epidemic” in Western countries.

Wave power is a form of renewable energy that may be harnessed for use in electricity generation. Capturing the energy of ocean surface waves and converting it into a useable form of electrical energy is a difficult task, and a major technological breakthrough is necessary if wave power is ever to contribute significantly to the world’s energy needs. Salter’s Duck, invented in 1974, remains the device against which all other wave energy systems are measured. Why has the Duck never gone to sea?