One would think that it would only take some dynamite to bring a standing bridge down, however that is not the case. It would appear that it takes a good many man hours to destroy a bridge, especially if the bridge was made in China almost entirely from trash in the first place. Much of the trash that was used to construct the bridge must be removed by hand. It probably takes half as much work to destruct a bridge as it does to construct one. Thus, what starts out as trash ends up as trash. It turns out to be a good way to recycle.