There is no doubt that using ANY resource that is grown in the ground can cause more serious issues than mining or digging out of the ground, but Hemp is the ONLY natural resource than can be produced indoors in controlled environments. Indoor production would negate the negative effects that this crop would have on the farm land and it could be scaled to any level needed. Therefore, the negative issues concerning Biomass fuels are eradicated.
"...but Hemp is the ONLY natural resource than can be produced indoors in controlled environments......Therefore, the negative issues concerning Biomass fuels are eradicated."

You're joking right?  If you grow the plants indoors, that doesn't mean they no longet need N, P, and K.  Now you've got to mine for the P and K and use natural gas to create the Nitrogen.  You've just shifted the "negative issues" to someplace other than where the plants are grown.
-BiologyFool (who thinks MJ should be legalized for other reasons)

There is (or was) an hydroelectric facility in northern Canada whose primary customer was an ammonia plant. The electricity was used to electrolyze water for hydrogen and to cryogenically extract nitrogen from the atmosphere. Using the Haber-Bosch process they manufactured NH3(anhydrous ammonia). No fossil fuels needed.