of Natural Resources
Poor Farming Practices
The Mayan population grew, sometimes to include cities with a hundred thousand or
more people. Soon, the farmers could not grow enough food and there was no more
good soil. Then the farmers started farming marginal land, such as hillsides.
That created other problems, because the hillsides were easily eroded by
rain. We may never know all the reasons why the Mayan civilization
disappeared, more or less suddenly around 900 AD.
Two things are clear: 1) people abandoned the cities and returned
to simpler living, and 2) massive farming efforts could no longer be
Oklahoma Dust Bowl. In the 1930s in the U.S., most of Oklahoma and much of West Texas turned into a dust bowl because of a drought.
People who live on islands are very dependent on the fish life around them. As an island becomes more populated with people, the demand for food from the sea can outstrip the source.
This has happened recently on the
off the coast of Honduras. The people there are very poor. Their
struggles were only made worse when they depleted the fish and sea
creatures. Such problems were made even worse when a seafood restaurant chain
set up a factory there for processing lobster and fish. It didn't take
long to exhaust the sea's supply.
Over-fishing not only threatens the human food supply but also that of other species that feed on sea life. One example of a species threatened in this way is the Russian Brown bear.
sign is fish
farming, where genetically modified fish are raised in captivity. Click
here for more on the promise of fish farming. For more on the world
crisis in over-fishing, click