Health
Irish Hospital Leads Charge to Cut Nitrous Oxide Waste Amid Climate Concerns
St John’s Hospital in Limerick has become one of the first medical facilities in Ireland to take decisive action against the environmental impact of nitrous oxide emissions by deactivating its central pipeline system for the gas, long used as an anaesthetic. The move is part of a growing effort in the healthcare sector to reduce its carbon footprint and curb avoidable waste.
Nitrous oxide, commonly known as laughing gas, has been used in hospitals for decades to relieve pain and anxiety during procedures. However, studies have shown that large volumes of the gas leak into the atmosphere due to outdated infrastructure, where it can remain for up to 120 years and contribute significantly to global warming.
Dr Hugh O’Callaghan, a consultant anaesthetist at St John’s, explained that while nitrous oxide remains safe and effective for clinical use, its delivery through centralised piping systems leads to “inevitable waste.” Instead, the hospital will now use portable canisters brought directly into operating rooms, a method that reduces gas leakage and emissions.
This initiative aligns with Ireland’s national plan to cut carbon emissions from anaesthetic gases by 50% by 2030. Other hospitals across the country are expected to follow St John’s lead in the coming months, according to the Health Service Executive (HSE).
Similar steps have already been taken in parts of the United Kingdom and the Netherlands. In England, hospitals that replaced central gas systems with mobile units saw a 55% drop in monthly nitrous oxide emissions, according to the NHS. In Manchester, the switch reportedly lowered the local health trust’s overall carbon footprint by up to 5%.
“It’s not about limiting clinical care—it’s about smarter, more sustainable delivery,” said Dr Cliff Shelton, a UK anaesthetist and co-chair of the environmental committee at the Association of Anaesthetists. The group has recommended decommissioning hospital nitrous oxide pipelines across the UK and Ireland by 2027.
Healthcare professionals increasingly acknowledge their sector’s role in climate change. Globally, the health sector accounts for about 4.4% of total emissions, with the European Union responsible for 248 million metric tons of carbon dioxide annually—trailing only the United States and China.
Although nitrous oxide and other anaesthetic gases contribute significantly to this footprint, experts stress that the bulk of emissions stem from the healthcare supply chain, including pharmaceuticals and medical equipment.
Still, efforts like those at St John’s Hospital are seen as important first steps. “When we looked into this, we found we were buying 100 times more nitrous oxide than we were actually using,” said Dr Shelton. “It’s a moral imperative to address that kind of waste.”
Health
World Cup Emotion Can Strain the Heart, Cardiologists Warn Fans at Risk
As the World Cup begins, medical experts are cautioning football fans with underlying heart conditions that the emotional intensity of matches can place unexpected strain on the cardiovascular system.
Cardiologists say that the excitement, tension, and anxiety generated during high-stakes games can trigger physical reactions similar to intense exercise, raising heart rate, blood pressure, and stress hormones.
“Intense emotions, whether positive or negative, can act as ‘precipitating risk factors’ for cardiovascular events such as heart attack,” said Paola Santalucia, a cardiologist and board member of the European Heart Network.
She explained that moments of extreme excitement, such as a decisive penalty shootout or a last-minute goal, may pose risks for people already living with heart disease. Those with additional risk factors, including hypertension, obesity, or smoking habits, are also advised to be cautious during emotionally charged matches.
Research using wearable devices has shown that during major football events, some fans experience heart rates climbing as high as 150 beats per minute. That level is comparable to sprinting and reflects how strongly the body reacts to emotional stress.
A study examining supporters during the 2025 German Cup final found that even watching from home can significantly affect physiological responses. “They still had an increase in heart rate that compares to walking, even though they didn’t walk,” said Christian Deutscher, professor of sports economics at Bielefeld University and co-author of the study.
He noted that the most intense reactions often occur not during goals themselves, but during moments of uncertainty such as VAR checks, penalty shootouts, or shots striking the post. These unpredictable situations, he said, are what drive the strongest emotional and physical responses among fans.
Deutscher also pointed out that stadium spectators may experience even greater strain due to environmental factors such as heat and alcohol consumption.
However, experts emphasize that football itself is not inherently dangerous. Instead, it is the body’s natural response to excitement that can create temporary stress.
“The adrenergic stimulation is at its max: extreme high blood pressure, high heart rate, and adrenaline, cortisol, skyrocketing,” said Dan Atar, professor of cardiology at Oslo University Hospital. In rare cases, he added, this surge can contribute to the rupture of arterial plaque in vulnerable individuals, potentially leading to a heart attack.
Atar stressed that such events can occur in everyday situations as well, including physical exertion like shoveling snow. “It is in no way dangerous to watch a football game,” he said. “All this is physiologic. It’s not dangerous to be excited.”
Still, he acknowledged that combining emotional stress with alcohol, heat, and pre-existing conditions can increase risk for some viewers.
Doctors advise those at higher risk to continue prescribed medications, limit alcohol intake, avoid smoking, and watch for warning signs such as chest pain or irregular heartbeat.
“The key message is not to avoid enjoying the match, but to do so with moderation and awareness,” Santalucia said.
Health
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Health
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