Скажите правильно ли написал ?

1) the ganges is the 2,600 km long and thus second largest river in india and bangladesh (south asia).
2) it flows through the great plain south of the himalayas, one of the most densely populated areas of the earth.
3) the ganges is the holiest river of the hindus; it is heavily contaminated by wastewater and pollutants.
4) it rises at 4230m altitude between three mountains in the bhagirathi mountains of the himalayas, in gaumukh.
5) many significant ceremonies are held in the cities along the ganges, where large pilgrimages take place annually.
6) meanwhile, the ganges but so heavily polluted and contaminated that one is not recommended to drink the water.
7) therefore the "operation ganges" has been trying to clean the heavily polluted river since 1985, but unfortunately this cleaning costs a lot of money.
8) for the hindus, the ganges is the holy river of india.
9) a bath in the ganges washes a hindu all sins and other inner "dirt" from the soul.
10) according to the hindu cremation, it is customary to scatter the ashes in the ganges.