LONDON, England: The National Health Service (NHS) has committed to net-zero carbon emissions by 2040 and is focused on reducing anaesthetic gas use. In UK dentistry, this growing pressure to decarbonise healthcare has placed the environmental impact of the use of nitrous oxide for conscious sedation under scrutiny. A new national quality improvement project has examined how this potent greenhouse gas is used across dental services and where emissions can be reduced without compromising care.