The expression "dark doldrums" chills the hearts of renewable-energy engineers, who use it to refer to the lulls when solar panels and wind turbines are thwarted by clouds, night, or still air. On a bright, cloudless day, a solar farm can generate prodigious a…
Na frase "But typical models exhaust their stored energy after only three or four hours of maximum output, and—as every smartphone owner knows—their capacity dwindles with each recharge." (2º parágrafo), "dwindles" poderia ser substituído, sem prejuízo de sentido, por
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