Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The efficient, the intensive, and the productive: insights from urban
  Kaya scaling   Urban areas play an unprecedented role in potentially mitigating climate
change and supporting sustainable development. In light of the rapid
urbanisation in many parts on the globe, it is crucial to understand the
relationship between settlement size and CO2 emission efficiency of cities.
Recent literature on urban scaling properties of emissions as a function of
population size have led to contradictory results and more importantly, lacked
an in-depth investigation of the essential factors and causes explaining such
scaling properties. Therefore, in analogy to the well-established Kaya
Identity, we develop a relation combining the involved exponents. We
demonstrate that application of this Urban Kaya Relation will enable a
comprehensive understanding about the intrinsic factors determining emission
efficiencies in large cities by applying it to a global dataset of 61 cities.
Contrary to traditional urban scaling studies which use Ordinary Least Squares
(OLS) regression, we show that the Reduced Major Axis (RMA) is necessary when
complex relations among scaling exponents are to be investigated. RMA is given
by the geometric mean of the two OLS slopes obtained by interchanging the
dependent and independent variable. We discuss the potential of the Urban Kaya
Relation in main-streaming local actions for climate change mitigation.

18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas