Over half of the nation's wetlands have been destroyed since the western advancement of the 1600's. ~100,000,000 acres have been lost. See (http://geochange.er.usgs.gov/sw/impacts/hydrology/wetlands/).
Most wetlands are in Louisiana. Some appear in Florida.
wetlands breed insects eaten by fish.
I know that Texas has wetlands. They are on the coast. Some other states might also have wetlands though.
The scarring from excavation would do a number on the land itself. Also, the plant life would grow back by the next warm season. If you want a better answer, ask a more specific question that outlines the methods used to remove plant life, etc. You are essentially asking what would happen if all of the hair on your body was shaved off at once. It would grow back and eventually look just the same as before. Try to shave and let us know how it goes.
the Grand Canyon
ponds and swamps.
THEY have been up 25 percent.
No. They are common there today.
to troll us all
it is because wetlands are useful because their proved us with fish and some are tourist attraction.
The U.S. economy had not been destroyed by fighting during WW2.
Hope this helps! wetlands..... purify water, protect from flooding, provide habitats for animals, and soak up flood water.