Coliform bacteria levels are extremely high in the Ganges. What causes this?

How would i answer this in a exam. orange - sea temperature is over 27 red arrows - tropical storm routes

Why do so many children develop illnesses in southern africa? a. poor nutrition due to poverty c. very bad air pollution b. climate many diseases thrive d. declining life expectancy

All of the following statements ere innovations that benefited farmers during the second agricultural revolution expect a. the iron plough b. the railroad c. animal husbandry d. plant domestication