It's a bit difficult to clean up some rivers as they originate in other countries. There is a program in place to clean up air polution. It has been in place for quite some time.
wisla?
all others get very little polution at their point of beginning.. most start in remote mountains.
is this a similar excuse the gov uses? since you said that the program has been in place for some time.. is there any actual progress or is it all smoke and mirrors?