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Denes Csala added q1.md
over 9 years ago
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$$C=N\left(\frac{GDP}N\right)\left(\frac{E}{GDP}\right)\left(\frac{C}E\right)$$
The *Kaya Identity* is a member of the I=PAT family of identities, which are used to describe human impact on the environment. The *Kaya Identity* in particualr is used is quantify CO2 emissions at any given point time and scale. It is a non-cumulative formula, however it can be integrated over $C$ to yield cumulative emissions for any given timescale.
Many people criticize the Kaya Identity (Rosa, Diez 2012) being overly simplistic (on the assumption that the different factors are linearly independent) so that it cannot possibly represent an accurate picture of such a complex system as the carbon emissions. A fierce debate has just recently (July 2014) got fired up the blog Watts up with that (which, despite the double-edged name labels, itself as the *world's most viewed site on global warming and climate change*. It got two responses labled as the BEER identity and a guest post by climate policy scientist Dr. Roger Pielke Jr. While the level of contributions is arguably questionable, it is imoprtant to notice that the Kaya identity is indeed very, simple, showcasing only 3 variable, yet we can still use it to deduce some ratehr remarkable conclusions.
In my answer I briefly present the current status of each of the components of the products as well their rates of change - an important consideration for further dynamic analysis.
