jeff barbee reports. >> poaching has become a crcriss the number of rhino killed for t their horn hasone from 13 in 2007, to over 1,000 in 2013 alone. but a new danger to the park may y be even more disastrous than the widespread poaching problem in the country. a new open-cacast coal l mine on the s southerrbordeder of the parkrk threatens this, africa's most important 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 e and benzene, and blow toxic coal dustt over this wilderness area. the mine will also discharge acid mine w water laced with sulfuric acid and radioactive byproducts into ththe umfolozi river, wheere the park's animals and the livestock of the surrounding community alall drink. >> and when we come hehere, we come h here to kind of, lili, to unwind and experience the wild, and now there's a mine happening on the edge of the wilderness, and d it's diluting every experiencece that the people are getting here. >> if hundreds of rhin