A school teacher who has been collecting discarded nitrous oxide canisters blighting the verges of his local roads said he ...

Minnesota lawmakers are working to become only the second to ban nitrous oxide - or "whippet" - canister sales.

There has been considerable national attention on the issue of nitrous oxide inhalation lately, largely affecting young people.

A bill would make it a crime to produce, manufacture, buy, or sell the products, sometimes called whippets, for the prohibited uses.