QUOTE(Jenny Pretty @ Sep 4 2013, 07:18 PM)
I have been currently submitting articles to Ezine and other article directories.
Yesterday, I checked on Google Webmaster tool and had 60 backlinks in 30 link pages. That means I submitted 30 articles to Ezine and each article I have two links.
If I continue doing this, then does Google penalize my site for un-natural backlinks?
i don't think Google will penalize you. As long as those links are coming from websites relevant to your target niche.