Wildlife is declining because of habitat destruction. It is declining because man is polluting the water. It is declining because humans hunt animals and kill them, sometimes for no reason other than "sport."
Although habitat loss is a major cause of wildlife decline, the most immediate threat to and around the world is the illegal trade and consumption of "bushmeat".
Some of the reasons for the decline of Sumer include the reduction of agricultural production. There was a population decline during this time, weakening the power of the Sumerians.
Find out what the reasons were and decided what were not the reasons.
-Aryan invasions -Decline in trade -Persistent floods
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Poachers hunting this endangered species has made the number of their population decline.
The answer is that they just pooped
The decline Bad emperors Inflation with economy Mercenarie army Too big
black death (plague) and crusades
it had too manny cheattas
The answer is that they just pooped