Puffs of hope

ON THE afternoon of July 25th renewable generators fulfilled about 78% of Germany’s domestic demand. Such a remarkable figure, combined with news of booming wind industries in America (see ) and China (), might lead you to think that the renewables revolution is more or less victorious, with the world moving forward into the broad, sunlit—and windy—uplands of copious clean energy. Alas, this is not the case.