The Tasmanian Greens are walking a fine line between two of their major policy areas – announcing their opposition to an experimental renewable energy system in a Wilderness World Heritage Area (WWHA).

Greens Senator Nick McKim wants the Federal Government to intervene in a hydro-electric scheme approved by the Meander Valley Council for the Fish River.

The project was proposed by renewable energy firm G7 Generation Pty Ltd, and will include six 1.5 megawatt pelton turbines connected to the Aurora power grid.

But the project site falls within the WWHA boundaries set in 2013, and the Greens say it will impact on values that saw it listed by the United Nations and protected under the Environmental Protection Biodiversity and Conservation Act.

Senator McKim says he has written to the Federal Environment Minister, Greg Hunt.

“It's really important that the Federal Environment Minister Greg Hunt actually call in this project and subject it to a high-level assessment,” he told the ABC.

“On the face of it, any proposal to generate electricity within the World Heritage Area would, by its very nature, be likely to have an impact on the World Heritage values of the property.

“Whether it's access, whether that be by road or any other means, any potential clearing that may occur as part of this project or any other impact.”

Senator McKim said the council may have been unaware of the World Heritage status of this site when it made its decision, as the development application did not include reference to the WWHA.

Mr Hunt has acknowledged the interest in the proposal, and is expected to make a comment soon.