  We present a study of the star formation properties of a sample of emission
line galaxies (ELGs) with respect to their environment. This study is part of a
bigger project that aimed to find galaxies in voids and to investigate the
large scale structure of the ELGs. A survey for ELGs was therefore conducted
with the result that 16 galaxies have been found in very low density
environments, of which 8 ELGs were found in two very well defined nearby voids.
The sample presented here contains some galaxies identified in voids, as well
as in the field environment that delimited the voids. These ELGs are all Blue
Compact Galaxies (BCGs), and all void galaxies are also dwarfs. Both void and
field sample contain the same mixture of morphological subtypes of BCDs, from
the extreme Searle-Sargent galaxies to the Dwarf-Amorphous Nuclear-Starburst
galaxies. The main result of this study is that field and void galaxies seem to
have similar star formation rates (SFR), similar ratios between the current SFR
and their average past SFR and similar mean SFR surface densities. There is no
trend in metallicity, in the sense that void galaxies would have lower
metallicities than their field counterparts. The field-cluster dichotomy is
also discussed using available results from the literature, since our sample
does not cover the cluster environment.
