It may be curtailed if there is a possibility that such expression might lead to some evil. In cooperative federalism, responsibilities are mingled and distinctions are A term derived by President Lyndon B. Johnson to describe his own view. I hope my answer has come to your help. God bless and have a nice day ahead!
Underground water like in a well can't clean itself because of man made pollutants, from large farms that seep through the ground. there is little agitation to keep it areated, and becomes stagnant, which develops bacteria and other pathogens to make us sick..
