19:08 Rosie Duffield (Labour)

Let us not forget another really important factor, as mentioned by the hon. Member for Glasgow Central (Alison Thewliss): nitrous oxide is a powerful greenhouse gas. It can stay in the atmosphere for up to 150 years, absorbing radiation and trapping heat, so not only is its misuse a blight on our society and a danger to people’s health, but it has an environmental impact too. These canisters will sit in landfills for ever.

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