The clock is ticking to preserve a portion of rare land in Brownstown Township near Detroit. A large chunk of the area known as Sibley Prairie, equal to about half the size of Detroit’s Belle Isle, was recently listed for auction, putting the land and the unique plants found there at risk of development. Now, environmental groups have struck a deal with the company that owns the land to buy it for preservation, but they only have until the end of the year to raise millions of dollars to buy and