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...
If you are coloring lighter use an ash base color and a 30 or 40 volume developer. Hair passes through the brassy stage through levels 6-8. Once hair is lifted pass level 8 all of the red or brassy tones will be removed from hair.