Chemistry, 03.08.2019 18:00 exiZT7535

Around the turn of the twentieth century, inventor robert shuman was engineering products that used energy directly from the sun to power motors and farms. he stated that coal and oil would eventually run out and that humans needed to learn how to use the more-abundant energy resource of the sun. during which stage of technological design did shuman identify that using oil and coal would be a problem?

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