I'm sorry George Foreman, food just ain't as good without it.
Fire, undoubtably a turning point in the levelling up of ancient man, gets a SZ from me, because let's be honest, no one likes to light their smokes with an induction lighter (like the one in your car's centre consol).
There are downsides to this miraculous element (house fires, witch burnings, forest fires, Fantastic 4) but those are far outweighed by its benefits.
@Pupik, the Chinese don't use fire for Tuesday. Tuesday is literally 'day 2' in Chinese unless you're referring to the character for 'qi' in which case that represents any elemental force and is also what CNG is called (gas). Unless I'm missing something here, which could be likely.