On the latest episode of the Environment Edge podcast, aired on 19 July 2025, Dr Deirdre Hennessy, a lecturer in Sustainable Agriculture at University College Cork (UCC), shared her expertise on the tools and technologies that farmers can employ to meet climate targets. The discussion, led by hosts Cathal Somers and Deirdre Glynn, delved into the complexities of sustainable farming and the importance of generational renewal in the agricultural sector.
Dr Hennessy emphasized the significance of engaging both current farmers and the next generation in the climate journey. She noted that the conversation around greenhouse gas emissions has been particularly prominent in dairy farming and agriculture over recent years. According to Dr Hennessy, Teagasc, the Irish Agriculture and Food Development Authority, has been instrumental in developing the Marginal Abatement Cost Curve (MACC). This tool is designed to help farmers reduce greenhouse gas emissions while maintaining economic viability.
The MACC curve is a critical resource for farmers, as it outlines various measures to mitigate emissions and their associated costs. By adopting these measures, farmers can make informed decisions that benefit both their bottom line and the environment. Dr Hennessy’s insights underscore the importance of technical efficiency on farms, which can lead to economic and environmental benefits.
Sustainability in agriculture, as Dr Hennessy pointed out, is a multifaceted concept. She described it as a “three-legged stool,” comprising economic, social, and environmental components. This holistic approach ensures that efforts to reduce emissions do not come at the expense of economic stability or social well-being. By integrating these three aspects, farmers can achieve a balanced and sustainable farming system.
The podcast episode also highlighted the role of technology in modern agriculture. Advances in agritech, such as precision farming tools, can help farmers optimize their operations, reduce waste, and lower emissions. These technologies, combined with the measures outlined in the MACC curve, provide a roadmap for farmers to navigate the challenges of climate change.
For those interested in gaining a deeper understanding of these topics, the full episode of the Environment Edge podcast is available for listening. The show page also offers additional episodes and resources, providing a wealth of information for farmers and anyone interested in sustainable agriculture.
This discussion on the Environment Edge podcast serves as a timely reminder of the ongoing efforts to make agriculture more sustainable. It also highlights the importance of collaboration between researchers, farmers, and policymakers in achieving climate targets. As the agricultural sector continues to evolve, the insights shared by Dr Hennessy offer valuable guidance for farmers looking to embrace sustainability.