Greens MP and mining spokeswoman Lee Rhiannon has spoken out against the Government's call for expressions of interest claiming coal mining will disrupt farming practices and contribute to climate change.

"Premier Morris Iemma in issuing this invitation shows he is willing to sacrifice valuable agricultural land to the greed of mining companies," Rhiannon said.

"At a time when climate change has the potential to disrupt farming practices the Labor Government should be working to safeguard all agriculture land.

"A key way to achieve this is to stop mining in agricultural areas, and to tackle climate change by phasing out the coal industry.

"But the NSW Government is working hand in hand with the coal industry to fast-track mining across this state."

Rhiannon said high coal prices are driving the industry at a speed faster than climate change restrictions can be enforced.

"If the NSW Government bows to the demands of the mining giants they will be seen as having no commitment to tackling climate change," she said.

"The Liverpool Plains is some of the richest agricultural land in Australia. The fertile black soils are fed by a number of aquifers that would be broken if mining is allowed in this area."

Expressions of interest in the 190 square kilometre area are open until February next year.