Blizzards, torrential rainstorms, tornadoes, hurricanes, flu epidemics,
domestic terrorism, earthquakes, nuclear war, and municipal bankruptcy
would all be pretty devastating.
The sahara made migrating rough because it was a desert but it was easier to pass through rather than south afria going through jungles

Actually Welcome to the Concept of the History.
Environmental Problems, such as Pollution in the river are :
=> The main causes of water pollution in the Ganga river are the disposal of human sewage and animal waste, increasing population density, and disposal of industrial waste into the river.
=> Some of the dams being constructed along the Ganges basin will submerge substantial areas of nearby forest.
Social problems:
1. The Ganga Action plan (GAP) largely ignored public participation despite having funds allocated for it. It is interesting to note, therefore, that the NGRBP has made provisions for public participation although it has not yet outlined how it is to be implemented .
2.Lack of proper discharge of religious offerings.
3.Lack of creation of eco-friendly offerings made to the river.
Biorights is an ideological concept which aims to protect organisms or areas of biological importance from the damaging impact of human intervention.