The Australian Greens say the Abbott government's RET review is a thinly veiled attack on solar and wind energy in favour of coal energy.
"Reducing our clean energy quota will not make electricity cheaper, it will just make it dirtier," Greens Leader Christine Milne said.
"All this hyperventilating we are seeing about energy prices is despite the fact that renewable energy has actually driven down wholesale prices in Australia.
"Not only that, renewable energy is reducing pollution and helping to mitigate the extreme droughts, fires and floods which are costing Australians dearly already.
"Australians already have a hands on understanding of clean energy with their rooftop solar but the Abbott government is trying to take us back to last century. 1.4 million households with solar panels are now competing directly with dirty coal generators and that is an excellent thing for people, the economy and the climate.
"The review is completely unnecessary and designed to justify slashing clean energy in favour of coal. It is a threat to current and future investments and will create huge uncertainty in the renewables industry.
"Climate denier Dick Warburton is one of the nation's chief opponents to carbon pricing and effective global warming policy. I'm sure the global warming sceptics in the government think he is a marvellous choice to head up this anti-wind and anti-solar review.
"Everyone knows where this is going. The review is just a move to severely cut our clean energy quota to put coal profits first."