Mr Parmeter said it is crucial that voters understand where candidates stand when it comes to the critical issue of CSG and he said it doesn't get any simpler than the Greens' message of no coal seam gas.

"We can sum it up in one word. No," he said.

"We don't need it. The Greens have been saying for a long time that we don't want it and a lot of other people are saying the same thing.

"We have seen landholders arrested for opposing CSG, which shows farmers don't want it. They are concerned about damage to land and damage to ground water."

The Santos site in the Pilliga Forest is a very good example of why Australia should shy away from CSG extraction, according to Mr Parmeter.

"There was groundwater contamination at the Pilliga site that was recorded, there was a spill that resulted in a fine and people are well aware of the issues around coal seam gas," he said.

"There are so many reasons why not to do coal seam gas and alternatives available. The Greens say look after our water, look after our land, look after our farmers.

"A group of farmers on the Liverpool Plains are going hard against CSG, there is a Dubbo group against CSG, a Gilgandra group against CSG and interested people at Narromine and Tooraweena."

Mr Parmeter said it was important that Australia look at clean, renewable options for future energy options. He said suggestions that CSG was a step in the right direction and better than traditional fossil fuel extractions were wide of the mark.

"There are reports that show that CSG is worse than coal," he said.

"The argument was that CSG would be better than coal. They call it a transition fuel, said it was better as far as greenhouse gases go but because of methane leakage, that's not certain. In the worst case scenario it would be worse."

While Mr Parmeter is pushing for no CSG extraction, the two major parties have stopped short of complete opposition. Labor Party for Dubbo Stephen Lawrence said his party had committed to a moratorium on exploration or extraction until there were answers on long term safety and other policies including a total ban in parts of the state including "water catchment areas, the Northern Rivers area of NSW, and important protected areas such as national parks and residential zones."

The coalition has rejected 16 application to explore and frozen any further applications until September 2015 and claim they have implemented some of the strictest standards.

Dubbo MP and Deputy Premier Troy Grant said "no future coal seam gas activity will occur that does not meet these world-best standards".

Mr Parmeter said there were other options for NSW that would help it's economy and the environment.

"People can trust the greens on this issue. The community can trust us, farmers can trust us. Our message is really simple," Mr Parmeter said.

"This is an industry that NSW doesn't need. NSW had its hottest year on record in 2014 and NASA said the globe had its warmest year on record. Seven out of Australia's 10 hottest years on record have come since 1998. From a climate change perspective, the last thing we need to be doing in investing in CSG.

"Focus on renewables."