An Irish hospital, St John’s Hospital in Limerick, is leading efforts to reduce the environmental impact of healthcare by stopping the use of nitrous oxide (laughing gas) as an anaesthetic. This change comes in response to concerns about the waste and emissions associated with outdated hospital infrastructure. Other hospitals in Ireland and Europe are expected to follow suit, aiming to cut carbon emissions from anaesthetic gases by 50% by 2030. The health sector is responsible for a significant portion of global emissions, and reducing nitrous oxide waste is seen as a crucial step towards sustainability.