MSU's Bert Cregg: Real Christmas trees are good for Michigan's environment and economy
Bert Cregg<cregg@msu.edu> -
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EmailMSU Christmas tree expert Bert Cregg explains the importance of Christmas trees to the Michigan economy.
http://www.mlive.com/environment/index.ssf/2011/11/msus_bert_cregg_real_christams.html
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