Cotton Prices on the Rise – oh my!

So I heard this story about the international rise of cotton prices on NPR earlier this week and was immediately curious about how it would/could affect my business.  Will I have to dig harder and deeper to find 100% cotton tshirts?  Will people start wearing them out more before giving them to second hand stores?  What’s your take?  Is wearing 100% undies as important as I think it is? :)