You eat it, drink it, sweat it, exploit it, feel it, see it and rely on it.
But how much do you know about it?
Join our Energy Tour for a journey through some of London's most famous - and less well-known landmarks - as we weave energy's epic story into the streets and buildings around us.
From the dawn of fossil fuels to leaky housing stock, from the origins of Shell Oil to the steps of Whitehall, from the lapping waters of the Thames to the grand delta of the Niger - let us fire your imagination towards a better energy future.
If you can't make it, or you want a sneak preview - check out our Londonist Out Loud podcast tracing the route of the tour.