disrupt economies with man-made floods & droughts

from danger room: A recently-unearthed U.S. Navy research project calls for creating mad-made floods and droughts to "disrupt [the] economy" of an enemy state.

"Weather modification was used successfully in Viet Nam to (among other things) hinder and impede the movement of personnel and material from North Viet Nam to South Viet Nam," notes a Naval Air Warfare Weapons Division - China Lake research proposal (96kb PDF), released last month through the Freedom of Information Act. But "since that time military research on Weather Modification has dwindled in the United States."

The proposal suggests a study of the latest weather manipulation techniques, to "give the U.S. military a viable, state-of-the-art weather modification capability again."