Human activity has a great impact on waterways. Decreased amounts of vegetation leads to erosion of water banks. Increased fertilizer and nutrients levels in water from agriculture, sewage, and industry lead to the formation of algal blooms and subsequent decrease in other aquatic organisms. Chemical and oil spills in waterways leads to the death of aquatic organisms as well. Regulation of industry, agriculture, and recreational activity can help reduce human impact on waterways. An increased awareness of human impact on waterways through education can lead to a decreased impact as well.