<article> <figure> <img src="http://www.moviesom.com/resources/20150216211140social.jpg" title='Petropolis: Aerial Perspectives on the Alberta Tar Sands' alt='Petropolis: Aerial Perspectives on the Alberta Tar Sands'/> </figure> <h1>Petropolis: Aerial Perspectives on the Alberta Tar Sands</h1> <p>The huge tar sands in Alberta are a potentially profitable resource, but the environmental impact could be heavy and long-term.</p> <details><summary>Runtime: 43</summary> <summary>Release date: 2009-01-01</summary></details> </article>