Hot water and foam is being used to kill weeds in Clones as part of a trial to reduce the use of traditional weed killers.
It's the latest in a series of trials by Monaghan County Council to move to more environmentally friendly products and stop using glyphosate-based products.
The process works by using heat to cook and break down the cells of the plant.
A machine produces hot water which is thermally insulated with a plant based product to ensure the heat is retained for longer on the plant.
The trial is running in Clones town for the duration of 2021, with the first of a minimum of three applications already completed.
Where glyphosate treatments are generally used twice a year, alternatives need additional visits to remain effective.
Last year, Monaghan County Council reversed a ban on using products such as Round-Up - a common brand of glyphosate-based weedkiller - after complaints about poor weed control.
The decision split public and political opinion.
In a statement, Monaghan County Council said this trial isn't a response to criticism of using the product, but one of a series of glyphosate alternative trials.
It added that the aim is to reduce potential levels of Glyphosate in local water supplies, and to encourage biodiversity by allowing areas to grow without regular cutting.