Mexico is slated to dump around 400 million gallons of sewage into the Tijuana River, which will mostly likely flow into the United States, a decades-old problem that has posed environmental ...

including sand and mud that never reaches Louisiana. NASA scientists estimate that the Mississippi River annually carries about 500 million tons of sediment to the Gulf of Mexico. Locked in a ...

Continued groundwater pumping could completely dry up the river. The introduction of exotic species ... the reservoir at Quitobaquito Springs cannot be recolonized with mud turtles from Mexico.