Place the lentils in a large saucepan; cover with water to 2 inches above lentils, and bring to a boil. Cover, reduce heat, and simmer 20 minutes or until tender. Drain well; add to bulgur, and set aside. Heat 1 tablespoon of olive oil in a large nonstick skillet over medium-high heat.
Turbidity is caused by include organic materials such as algae, and inorganic materials such as silt and sediment. Suspended solids in a body of water are often due to natural causes. These natural solids include organic materials such as algae, and inorganic materials such as silt and sediment.
Turbidity is a measure of the degree to which the water loses its transparency due to the presence of suspended particulates. The more total suspended solids in the water, the murkier it seems and the higher the turbidity.