Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How circular economy and industrial ecology concepts are intertwined? A
  bibliometric and text mining analysis   Combining new insights from both bibliometric and text mining analyses, with
prior relevant research conversations on circular economy (CE) and industrial
ecology (IE), this paper aims to clarify the recent development trends and
relations between these concepts, including their representations and
applications. On this basis, discussions are made and recommendations provided
on how CE and IE approaches, tools, and indicators can complement each other to
enable and catalyze a more circular and sustainable development, by supporting
sustainable policy-making and monitoring sound CE strategies in industrial
practices.

34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys