GIA Grupo de Interferência Ambiental from Salvador ?

So I am trying to read the Portuguese here-- and it looks like  this 
is a journalistic review which describes an action/festival by Grupo 
GIA in parallel to/ next to ARCO this year-- which the journalist says 
is / was more important than ARCO.  Can you give us a quick general 
translation (summary is fine)?
This is really interesting. ..

mais>

https://mail.cofa.unsw.edu.au/pipermail/empyre/2008-May/000601.html