Helium is a non renewable source which is extracted from natural resources has been getting scarce in places like the UK and US for a number of years.
Helium balloons are often used at parties and other events, but many people don't realise that helium plays an important role in hospitals using medical technology such as MRI scanners (magnetic resonance imaging) which are machines that can be used for scans of soft tissues to diagnose tumours or various types of cancer.
Liquid helium is needed to cool the superconducting magnet that provides the magnet fields.
In addition people use helium to breathe in to alter the pitch of their voice temporarily but this is also bad for your health because it can cause dizziness or vomiting.
Vous êtes sûr ? Votre mobilisation est importante pour que les pétitions atteignent la victoire !
Sachez que vous pouvez vous désinscrire dès que vous le souhaitez.
