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Showing posts from May, 2019

Chapter One - The Kaya Identity & IPAT

Carbon dioxide is a greenhouse gas that is contributing to climate change by trapping solar infra-red rays within the atmosphere and, in turn, heating up the ocean and land temperatures.  Although other gases play a role, since 2000 the dominant gas is CO2.  CO2 is the biggest headache and therefore the focus in this blog.

The 'problem' of climate change is immensely complicated but, at the same time, the solution is very simple - we need to stop emissions.  Without getting too involved in the contradictions surrounding the subject (and often hypocritical actions), resolution can be simplified into one equation, the Kaya Identity, which was developed by a Japanese energy economist of the same name, Yoichi Kaya (1993):

           F = P * (G/P) * (E/G) * (F/E) = P * g * e * f


F is global CO2 emissions from human sources;

P is the global population;

G is world GDP (Gross Domestic Product) and g = (G/P) the global per-capita GDP;

E is global primary energy consumption and …