Environmental services in landscaping are used to protect water sources from being contaminated. These services include silt and straw, storm water management ponds, and silt fence installation. Seed and straw are used to plant trees and shrubs and to protect the soil from erosion. Storm water management ponds collect and store rainwater and then slowly release it into the environment. Silt fences are designed to capture sediment and other pollutants before they can enter a water source. These services help to keep the water sources clean and prevent them from being contaminated.