Renewable resources are topical,given the increasing emphasis on sustainability within chemical industry and the energy community.Before plunging into a brief discussion of some online resources available in these areas,it is worth mentioning bigger issues.Students need to be asked to define "renewable"and "sustainable".The sun is not a renewable resource,but its projected remaining lifetime of approximately five billion years is so great on a human time scale that it is perfectly reasonable to have solar energy (whether obtained by direct conversion to electricity/hydrogen or via biofuels)as the underpinning of clean,renewable energy.
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