Manicore - What is Kaya's equation ?

Manicore - What is Kaya's equation ?: "Greenhouse gases emissions, wealth, energy intensity, population... How can we link together, in a simple way, all these physical and economical notions - that each are of common use for part of the protagonists of this file - in the context of the problem we are presently adressing ? An equation, said to be of Kaya, for it is named after the japanese professor to whom the rumor attributes the 'discovery' of this equation (a sure thing is that this professor is a well known researcher in the energy policy sector), allows to show how these notions can be linked to one another."