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Abstract
There exist an urgent need to reduce ammonia (NH3) emissions to control air pollution and moderate other related environmental and health hazards. . This study adopts farm-level marginal abatement cost curve (MACC) analysis across different farm typologies in Ireland. The study also addresses the interactions amongst the abatement options and the presence of farm heterogeneity in order to examine whether it is sub-optimal to adopt a single marginal abatement cost curve across different farm systems. Teagasc National Farm Survey (NFS) 2020 data was used as the basis of the analysis in the paper. The findings show that the selected measures are effective in abating ammonia emissions at varying levels across the different farm typologies. Liming, protected urea and crude protein in diets were primarily cost-saving while the clover measure examined moved between cost-saving and cost positive across the different farm types. The presence of heterogeneity across the farm typologies was further supported by the difference in the MACC diagram of the farm types. Furthermore, a higher abatement potential (>100 kgNH3) was reported for the combined measure as against the stand-alone measures.