An environmentally friendly, totally non-radioactive variant of the hugely unpopular H-Bomb.
Goes *plop* on detonation instead of *kaboom*, and the payload is extremely beneficial to plant life.
Also, it is easy to construct using a mere plastic bag and lots of di-hydrogen monoxide.
After they dropped that 20 Kiloton H2O bomb on Saudi Arabia, Oasises started sprouting everywhere! It's incredible!