Air

                Universe is so big

It's the home of cow, Sheep and pig

21% is oxygen

78% Nitrogen

Lavosier proved this after a lot of pain

'Hydro' means water 'gen' means generating

Cavendish is the scientist discovering

Carbondioxide extinguishes fire

It's present in every extinguisher we hire

This fact of it we should admire

  By Caesar Borgia