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...
Blue (a primary color) is the coolest cool color and is also the darkest. It generally lives at a level three. (More on levels to come.) You will need to remember this as the more blue that is added to your hair color, it will produce a darker, cooler tone. Red or yellow (also primaries) are warm colors.