GREEN BAY, WI (WATQ) - What kind of benefits do trees have in a community, how about over $6 million worth every year in the Green Bay area.  That’s according to the Wisconsin DNR’s new study on the urban tree canopy.  The DNR says trees planted by officials provide benefits like shade from warm temperatures, increase property values, ease the pressure on the city’s sewer system, and also help eliminate pollutants.  "Your community has so many more trees than just on the streets, and so $6 million just for the streets, can you imagine what the benefits are for your entire community" said DNR Urban forest assistant Kimberly Miller.  The study says 24% of the entire Green Bay metro area is covered by a tree canopy with the potential of an additonoal 56% of canopy cover.