Can the U.S. run only on wind, water, and solar power? Scientists disagree.

Scientists widely agree that human activity is the main driver of global warming, and that we have to radically reduce greenhouse gas emissions to avoid its worst impacts. But when it comes to how we can best slash emissions, some scientists are fiercely at odds.

A scholarly brawl broke out this week after energy experts ripped apart a widely cited 2015 study that found the U.S. economy could affordably run on 100-percent renewable energy by midcentury.

SEE ALSO: Climate change efforts still 'not nearly enough' to meet Paris targets

Nearly two dozen physicists, engineers, climate scientists, and scholars poked gaping holes in the previous analysis — which asserts that wind, solar, and hydropower alone could power not only the entire U.S. electric grid but also the transportation system, all heating needs, and the entire industrial sector by 2055.  Read more...

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