What is the global impact of anaesthesia?

This is uncertain. Discussion usually centres on the environmental impact of anaesthetic gasses and inhalational agents (see below) and disregards the contributions made by equipment and drug manufacture/transport (procurement accounting for approximately 60% of NHS carbon emissions), patient and staff transport (~22%), building energy use (~18%) and waste disposal (~2300 kg anaesthetic waste/theatre/year). Given that anaesthesia is administered by ~15,000 anaesthetists for ~450,000 surgical procedures annually in the UK (~200 million anaesthetics worldwide), it might be expected that the global impact of anaesthesia is not insignificant.