Visitors to nationwide parks can impression water quality by introducing substances directly into our bodies of water, corresponding to via using streams to scrub dishes. Unfortunately, what happens outdoors parks can even have a big influence on water and aquatic creatures within the park. For instance, phosphorus and sulfur in the water in Everglades National Park are negatively affecting plants and animals there. These chemical substances are being launched into the waters in the park by way of runoff from nearby farms. In Shenandoah National Park in Virginia, atmospheric deposition, such as acid precipitation from fossil fuels, is reducing the pH in some streams. National parks and other places where humans go to spend time in nature provide unique conditions the place humans and wild animals come in nearer contact than they normally do.