Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Removal of Pollutants by Atmospheric Non Thermal Plasmas   Results on the application of non thermal plasmas in two environmentally
important fields: oxidative removal of VOC and NOx in excess of oxygen were
presented. The synergetic application of a plasma-catalytic treatment of NOx in
excess of oxygen is also described.

29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat