My website looks great on both desktop and mobile devices without any viewport issues, until I added Google+ comments. These comments will automatically set the width of the page to a specified amount:
<!-- Google comments -->
<script src="https://apis.google.com/js/plusone.js">
</script>
<div class="g-comments"
data-href="[URL-OF-PAGE-HERE]"
data-width="720"
data-first_party_property="BLOGGER"
data-view_type="FILTERED_POSTMOD">
</div>
For an example, visit this page. Resize the window horizontally to see the issue.
Is there a way to fix this problem, or is it indeed caused by Google's code?