1 A disinfectant, such as chlorine, is usually added to the wastewater before it leaves the treatment plant. 2  The disinfectant kills disease-causing organisms in the water. 3  After treatment, the water can be returned to nearby waterways. 4  It can also be used on land for agriculture and other purposes.
Federalism refers to the mixed or compound mode of government, combining a general government (the central or 'federal' government) with regional governments (provincial, state, Land, cantonal, territorial or other sub-unit governments) in a single political system.
Dual federalism is a theory of federal constitutional law in the United States where governmental power is divided into two separate spheres. One sphere of power belongs to the federal government while the other severally belongs to each constituent state.