Untitled

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Collapsing Margins</title>
    <link rel="stylesheet" href="stylesheets/main.css" type="text/css">
  </head>

  <body>
    <div>This is paragraph 1</div>
    <div class="preserve-vertical-margins"></div>
    <div>This is paragraph 2</div>
  </body>
</html>