This toolis very helpful to blogger.

1.Login to your dashboard--> layout- -> Edit HTML

2.Click on "Expand Widget Templates"

3.Scroll down to till you see this :

<data:post.body/>

4.Now copy below code and paste it just after <data:post.body/> .

<script type="text/javascript">
var ecov = "sh2";
document.write(unescape("%3Cscript src='http://eco-safe.com/js/eco.js' type='text/javascript'%3E%3C/script%3E"));
</script>

Now save your template and you are done.It will look like this.

This tool can see under your blogger post.