Sinn Féin MLA Áine Murphy has said the changes to the entitlement to use red diesel coming into effect in April will hit businesses already struggling with increased costs, and could put jobs at risk.
The Fermanagh South Tyrone MLA warned the move will hit businesses in Fermanagh "hard".
She said: "The change in the entitlements to use red diesel will not reduce carbon emissions in itself. This change seems to be designed to increase revenues for the British Treasury in Westminster.
"It will hit businesses here in Fermanagh hard, particularly in the construction, quarrying and manufacturing sectors."
She continued: "These sectors are already struggling with increased costs of materials and soaring energy prices and this thoughtless move by the British government could put jobs at risk.
"I have written to the Secretary of the Treasury to ask what consideration was given to the impact of these measures here, and furthermore, what level of engagement took place with organisations and stakeholders in the North and South.
"The British Chancellor should pause this move and instead support businesses in taking the necessary action to move away from fossil fuels."
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