General attempt statue or attempt
The Tectonic Forces is responsible in that creation
It's the convection currents that happen in the asthenosphere part of the Earth Crust , causing the African Plates to Diverge and continuously produce Rifts that will eventually formed a rift valley
This process can take millions of years
i think that the two main causes in the Yangtze river sewage and industrial waste dumping. Apparently the river has gotten more polluted every year due to the dumping of waste contamidating the water.
Too much power in the state governments was the main concern with John Dickinson's first draft of the Articles of Confederation.