The United States Geological Survey estimates that (as of 2005, the most recent year for which data is available) we withdraw 410 billion gallons of water a day, including both fresh and saline water. Most (80%) of these withdrawals go to thermoelectric power plants (for cooling) and agriculture (for watering crops).
Level 4 is the hair color level that is represented as dark brown. It is one of the most common natural hair colors and also very commonly found in hair dye. Level 4 is also common in red or...
Any hair color that penetrates deep into the hair shaft and seals color into the hair cortex, is called a permanent hair color. As the name says, once you color your hair with a permanent hair colorant, the hair color stays and does not wash out with shampoo. These are Class 3 colorants.