Climate change is a central concern here at Levees Not War—it keeps us up late at night. The reasons are obvious: As we’ve said before, even Category 5–strength flood protection is useless if global warming raises sea levels by 10 or 20 feet or more, as scientists have warned may happen in this century. (See ‘Swiftly Melting Planet 2007,’ several posts down.) The trend can be slowed, and eventually reversed, by massive coordinated—and sustained—effort.