Is polystyrene really bad?

What is wrong with putting polystyrene in a landfill?

There are varying opinions on the environmental impact of polystyrene and you will need to do your own research. Please watch this video from the University of Santa Cruz.

( 15.8MB, 03:35 mins ) Adapted, with permisssion, from the original video at: http://www.vimeo.com/8834037
 
Is polystyrene really bad?