The true cost of illegal immigration

The CIS tour group was taken to restricted locations not normally visited by tourists. The destruction of the environment, the piles of garbage, the utter disregard for the land and wildlife in the area was sickening. Cars, bikes, tires, gas cans, back packs by the thousands, black water bottles and black plastic bags (not detected by aircraft), clothes, dirty diapers, used tampons and much more are all left behind in "lay up" areas when illegal aliens catch their ride to their new life in the U.S. Tons and tons of garbage have been cleaned up by volunteers. Sadly, there is much, much more in new lay up areas found all the time. Question: Where is the outrage from the environmentalists?