Steps should certainly be taken to rebuild the coastal wetlands that have been eroded over time due to river dredging, oil drilling, and other human progressions.

CNN: Your e-mails: Balancing nature, commerce

Ortega's forces are dredging the river as part of an Iranian-sponsored project to build a canal along the Isthmus of Nicaragua that will rival the Panama Canal.

CENTERFORSECURITYPOLICY: Why Latin America turned

One man spent months dredging the River Severn.

ECONOMIST: The man and his pen

In the waning days of the Clinton administration, the Environmental Protection Agency issued an edict that General Electric spend nearly half a billion dollars dredging the Hudson River to remove PCBs, which are supposedly carcinogenic.

FORBES: Fact and Comment

In the waning days of the Clinton ad-ministration, the Environmental Protection Agency issued an edict that General Electric spend nearly half a billion dollars dredging the Hudson River to remove PCBs, which are supposedly carcinogenic.

FORBES: Surplus?

The EPA said additional dredging would clean up the river faster, but it noted that other state and federal agencies have the authority to address the issue.

WSJ: GE to study Hudson River cleanup expansion

Dredging will continue over the next few years, after which the river should be PCB-free.

ECONOMIST: Pollution and evolution