Traffic to external link – can't find the link on website

Hey, I have a strange problem with my blog. For some time my wordpress stats plugin is showing up an external link under Clicks section that I hope I have not added into any of my page..

I tried every possible tools to find out what page on my site has that link but failed to get the information.

I even checked the whole list of incoming links for external domain but my domain is not listed in the results.

Please suggest me what can I do to find out what page of my website has that external link..

My blog is here https://www.environmentabout.com