Which are the following statements relate to the environmental impact of Micro-Hydro-Power?

Click on the right answer.

ID: RE08b

Hydro schemes provide carbon free and zero pollution electricity.
Planning permission is normally required from the local authority.
The environmental impacts associated with the construction are high and possible
      alterations to the river environment are depending on the scale of the project.
The water that is used to run the turbine is returned to the river and is aerated by passing through the turbine and tailrace.
Most sites are suitable for Micro Hydro Power.
The turbine can actually improve water quality.