Human Factor Examples
"Mining has caused great changes in parts of the Sonoran Desert. The early small-scale mines may not have produced much in the way of valuable minerals but they left scars and trash dumps still visible today. Cattle ranching has caused changes in plant communities. Mining and ranching are responsible for causing communities to grow up around them to provide food and other supplies. Agriculture has led to the clearing of miles and miles of natural vegetation and the use of enormous amounts of water. Interestingly, many of the historic and modern canals along the Salt and Gila rivers follow the traces of the prehistoric Hohokam canals." (Human Factors)