Google hires a flock of 200 goats occasionally to clear weeds and brush to reduce fire hazard in their lawns rather than using land-mowers .They say It costs us about the same as mowing, and goats are a lot cuter to watch than lawn mowers.But mainly because of their decision to take a low-carbon approach: Instead of using noisy mowers that run on gasoline and pollute the air.The goats  spend roughly a week at Google. But is it really greener? What about the emissions of gas  due to the transportation of the goats?