Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The energy-population conundrum and its possible solution   Oil prices above $100/barrel values have proven unaffordable for the world
economy, while lower prices have proven unaffordable for unconventional oil
sources, resulting in a frantic price swing since 2007-2008. We identify and
combine for the first time the competing dynamics of oil price, economic growth
and extraction costs in a single model aiming to evaluate the near-term
consequences of these dynamics onto forthcoming oil supply. Policies able to
cope with the consequences of the resulting energy scenario are suggested in
the conclusions.

29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg