a new opepen-cast c coal minene on ththe southen n border of the park threatetens this, africa's mostmportant rhino breeding ground. park officials here worry that this new danger could be a deep dark hole for rhino conservation, because the mine will pollute the air with dangerous gases, like toluene and benzene, and blow toxic coal dust over this wilderness area. the mine will also discharge acid mine water laced with sulfuric ac and radioactive byprododucts intnto the umumfolozi river, where the park'k's animals and the livestock of the surrounding community all drink. >> and when we comomhere, wewe come here to kind ofof, li, to unwind and experience the wild, and now there's a mine happening on the edge of the wilderness, and it''s dilutinineverery experirience that the people are getting here. >> if hundreds of rhinos are killed for their horn, the population can be reestablished as long as enough are saved. but if the park is polluted with toxic mine waste, this last refuge of the rhino will be lost forever. >> where our concern lies is with respect to dust, because there's no