AN industry bid to win carbon tax breaks for opencast coal mines in Scotland has run into fierce opposition from environmentalists in the run-up to a debate by MPs at Westminster.

The Durham-based coal company Hargreaves Services is lobbying for exemptions to carbon taxes so that it can mine new coal and use some of the profits to restore derelict opencast sites. But critics say the tax breaks could just end up subsidising mines that damage the environment and fail to restore some of the worst sites.

Instead they are proposing using carbon taxes to build up a £100 million restoration fund. This could ensure that restoration is properly targeted, sustainable and of real benefit to communities and the environment, they argue.

After two coal companies went bust in 2013, Scotland was left with a massive £200 million hole in the funds needed to clean up the mess made by 32 opencast coal mines in East Ayrshire, Lanarkshire, Dumfries and Galloway, Fife and Midlothian.

Ministers and industry have since been struggling with how to ensure that the promises made to local communities to repair their scarred landscapes are kept. Hargreaves, which now operates seven opencast mines and looks after another seven defunct mines in Scotland, warned in December that falling coal prices would lead to a big drop in profits this year.

The company has now suggested that some opencast mines could be made exempt from paying tax under the Carbon Price Support mechanism. This would enable money to be saved and diverted into paying for old mines to be restored, it said.

But in a briefing to MPs in advance of a debate on “orphaned” opencast coal sites in Westminster Hall on Wednesday, the Royal Society for the Protection of Birds (RSPB) in Scotland has sounded the alarm about the proposed tax breaks.

“There are serious risks that this mechanism would fail to target priority areas, create pressure for coaling at inappropriate sites and encourage extraction at economically marginal sites in the face of declining prices, risking further industry collapse,” it warned.

It was unclear how the tax breaks would help sites where no new mining was possible, RSPB Scotland argued. “At other sites, funds generated by an exemption would either far exceed or fall short of the needs at that site, necessitating complex oversight to ensure funds are channelled to areas of need, are used for restoration and do not just subsidise coaling.”

RSPB Scotland’s head of conservation policy Lloyd Austin accused the industry of “shamefully” failing to pay to clean up its pollution. “Communities and wildlife in Scotland are still suffering, two years on, from the collapse of the opencast industry,” he told The National.

“We need a responsible approach to repairing these areas, which both supports jobs and uses funds to secure lasting benefits for communities and for wildlife.”

In its briefing, RSPB Scotland argued for a new fund to be financed from taxes paid under the Carbon Price Support (CPS) mechanism. “Establishing a £100 million restoration investment fund would require less than one per cent of CPS revenue over five years,” it suggested.

According to Friends of the Earth Scotland, handing out new tax breaks to the dirtiest fossil fuel industry would send a “terrible signal” about cutting climate pollution. “We should be getting on with putting this dirty industry behind us, supporting and retraining coal workers to find new employment and cleaning up its toxic legacy,” said the group’s director Dr Richard Dixon.

The leader of the Scottish Liberal Democrats, Willie Rennie MSP, argued that there were “huge question marks” over the proposal from Hargreaves. “Government action and support is required for the clean up and it is imperative that any scheme includes a commitment to wind down the industry as a whole,” he said.

Hargreaves said that it could not comment on the proposed fund suggested by RSPB Scotland as it had not seen specifics. “Our goal is to see widespread restoration and be able to support the jobs necessary to deliver that restoration,” said the company’s financial director Iain Cockburn.

“Opposition to our solution in isolation of investing the time and effort to develop a workable and broadly supported alternative may inadvertently result in a situation where no solution gets delivered. In these austere times, the Treasury does not need much excuse or encouragement to do nothing.

“I am already concerned that valuable time and a crucial degree of momentum have been lost since the election. We have already had to reduce the size of our workforce and communities have had to endure another year of living with unrestored sites.”