Some smoke alarms have been designed to be ultra-sensitive. Aspirating devices, for example, constantly suck in air in order to detect even small quantities of smoke in a room. They are often used in commercial settings, including server rooms packed with expensive computer tech.
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These ideas of the UK and Europe in decline have also been taken up by high-profile, influential figures, including X, Tesla and Space X owner Elon Musk, who spoke at far-right activist Tommy Robinson's Unite the Kingdom rally last year.
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