Nitrous oxide: why the environment isn't amused about laughing gas A young man breathes deeply from a gas-filled bag. He begins to feel a pleasurable sensation “particularly in the chest and extremities” before dancing around and then collapsing in a heap. A few minutes later he comes to and is consumed by a fit of giggles. The young man is a chemist, living in Bristol and his name is Humphry Davy. The year is 1799 and Davy has just discovered the euphoric effects of nitrous oxide (N₂O), which he names “laughing gas”. Word soon spread through high society and laughing gas parties became all the rage. But, despite its pain relief properties, it wasn’t adopted in medical settings until the middle of the 19th century.
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