How falling solar costs have renewed clean hydrogen hopes

As nations do the hard math on how to meet their climate goals, green hydrogen increasingly appears essential. "For one thing, the economics are rapidly changing. We can produce hydrogen directly by simply splitting water, in a process known as electrolysis, but it's been prohibitively expensive in large part because it requires a lot of electricity. As the price of solar and wind power continues to rapidly decline, however, it will begin to look far more feasible." James Temple investigates in MIT Technology Review.