 
 <prompt> Wetin dey prevent people from dey sick? Given di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: In recent times, dem dey use hydrogen either alone or mix am with nitrogen (wey dem sometimes dey call forming gas) as tracer gas for small leak detection. Dem dey use am for automotive, chemical, power generation, aerospace, and telecommunications industries. Hydrogen dey authorized as food additive (E 949) wey allow food package leak testing and get anti-oxidizing properties. 