Researchers at Cambridge University have said some of the UK 's five million asthma sufferers could switch their treatments from metered - dose varieties – which contain greenhouse gases – to more sustainable versions . The move would have the same environmental impact as being vegetarian , the researchers said . Replacing doses of every 10 metered - dose varieties would reduce carbon dioxide ( CO2 ) equivalent emissions by 58 kilotonnes . The scientists said patients who needed the metered - dose inhalers could not switch , but could ensure every puff counted by keeping their technique assessed .
Researchers at Cambridge University have said some of the UK's five million asthma sufferers could switch their inhalers from metered-dose varieties – which contain greenhouse gases – to more sustainable versions. The move would have the same environmental impact as becoming vegetarian, the team said. Replacing one of every 10 metered-dose inhalers would reduce carbon dioxide (CO2) equivalent emissions by 58 kilotonnes. The scientists said patients who needed the metered-dose inhalers should not switch, but could ensure every puff counted by having their technique assessed.