Wall Street Journal: The Dutch are embarking on a decades-long plan to improve their flood-control system because they’re afraid that rising sea levels from global warming will threaten their low-lying country. The effort, which the government says could cost EUR1 billion ($1.27 billion) a year through 2100, would include massive, decades-long public works, such as raising dikes and reinforcing storm barriers. One proposal calls for improving the defenses of Rotterdam, Europe’s largest container port, …