It can be inferred from the passage that ______.

参考解析：

推理判断题。根据第三段倒数第二句“Carmakers may hit their goal of annual sales of 10m electric vehicles in a decade, but battery-powered road haulage, shipping and aviation are dreams.”可知，汽车制造商可能会在十年内实现电动汽车年销量1000万辆的目标，但电池驱动的公路运输、航运和航空运输都只是梦想。根据该句可知，电池驱动的航运实现起来还是有困难，因此A项错误；根据最后一段第五句“Carbon emissions in Germany actually rose”可知，德国的排放量实际上是增长的，因此B项错误；根据第三段最后一句“A much-quoted claim that America could rely on wind, solar and hydro alone for its electricity has recently been witheringly criticized by a group of respected academics.”可知，一个被广泛引用的说法是，美国的电力只能依靠风能、太阳能和水力发电，最近却遭到了一批受人尊敬的学者的严厉批评，因此C项正确；根据第三段前四句“But not every target is helpful. To see why, consider that goal of 100% renewable energy. It makes solving climate change seem deceptively easy. In fact, though wind and solar can generate all a country’s electricity on some days, renewables still account for less than 8% of the world’s total power output.”可知，解决气候变化问题看起来似乎很容易，但是还存在产量不足的问题，因此D项错误。故选C。