Fuel cells were left by the wayside as solar power and wind power grew in popularity. But now it seems as though fuel cells are beginning to establish themselves in niches that show promise for the future, Kennedy writes.
Under the National Security Act, South Koreans can be sentenced for everything from re-tweeting North Korea's official Twitter account to reading northern propaganda.
North Korea went on high alert and said the US should forgo planned military exercises with Japan and South Korea. But it could have a hidden agenda.
Cities are dynamos of the global economy. Encouraging new ideas on transportation, food, housing, and jobs can make them even more vibrant.