Beetles infesting pine forests in Canada are threatening to spread across North America. 2009-12-02T11:05:36Z tag:feeds.bbc.co.uk,2008:/iplayer/feed/episode/p003jcvq BBC http://www.bbc.co.uk tag:feeds.bbc.co.uk,2008:PIPS:p003jcvq <p> <a href="http://www.bbc.co.uk/iplayer/episode/p003jcvq/Discovery_Natural_Disasters_Episode_2/"> <img src="http://node2.bbcimg.co.uk/iplayer/images/episode/p003jcvq_150_84.jpg" alt="Discovery: Natural Disasters: Episode 2" /> </a> </p> <p> Beetles infesting pine forests in Canada are threatening to spread across North America. </p>