Welcome to the Q&A Forum

I am working with a client and recently discovered that they have several URLs that go to the same page. http://www.maps.com/FunFacts.aspx
http://www.maps.com/funfacts.aspx
http://www.maps.com/FunFacts.aspx?nav=FF
http://www.maps.com/FunFacts.aspx?nav=FS
http://www.maps.com/funfacts.aspx?nav=FF
http://www.maps.com/funfacts.aspx?nav=ffhttp://www.maps.com/FunFacts.aspx?nav=MShttp://www.maps.com/funfacts.aspx?nav=
http://www.maps.com/FunFacts.aspx?nav=FF#
http://www.maps.com/FunFacts
http://www.maps.com/funfacts.aspx?.nav=FF I am afraid this is happening all over the site. So, my question is: Is this hurting the SEO and how? If so what is the best way to go about fixing this problem? Thanks for your help!