Well, in factorys, cars, ect. smoke comes out and pollutes the air, which goes to oceans, lakes seas, ect. In water, there can be many bacteria that you can't see, like in furniture and other stuff. To not prevent unclean air, do not pollute!! To make sure you don't drink unclean water, don't drink out of rivers, streams, rain, lakes, ect!
unclean air to breathe, unclean water to drink, trashed streets and parks for all the little kids and dogs.
no
Drinking water that is not clean
all
99%
it kills the animals and make the water unclean
Highly likely ! Unclean water could contain bacteria that can enter a persons bloodstream via the newly pierced hole !
This depends on what you consider to be 'unclean'. Visibly unclean water would normally have been caused by mud/algae and thus be brown/red/green. The water could however have been polluted by something else, possibly a metal ore or salt, which could give rise to another colour. You could also consider bacteria to make water unclean, in which case it would often have no unusual colouring at all.
boiled it
There is medicine to cure some diseases from unclean water.
99%
it is caused by unclean water or lack of clean water