How Windmills as Wide as Jumbo Jets
Are Making Clean Energy Mainstream

By STANLEY REED, CARSTEN SNEJBJERG and RASMUS DEGNBOL APRIL 23, 2018

Prototype wind turbines whirl at a testing site in Osterild, near the northern end of Denmark’s Jutland peninsula. By Rasmus Degnbol

OSTERILD, Denmark — At the northern end of Denmark’s Jutland peninsula, the wind blows so hard that rows of trees grow in one direction, like gnarled flags.

 The relentless weather over this long strip of farmland, bogs and mud flats — and the real-world laboratory it provides — has given the country a leading role in transforming wind power into a viable source of clean energy…