While there are prescription treatment options available, many ADHD patients on stimulants do not achieve adequate control of symptoms, explained Rakesh Jain, MD, MPH, director of psychiatric drug research for R/D Clinical Research in Lake Jackson, Texas, in a company news release.
The collective mass of water found on, under, and over the surface of a planet is called the hydrosphere. Earth's approximate water volume (the total water supply of the world) is 1,338,000,000 km3 (321,000,000 mi3).
If the amount of fresh water is constant on Earth then why do we need to conserve it? What is the percentage of fresh water on the Earth? Why does on the earth only 3% fresh water and rest 97% about sea water? Why Earth contains so much saline water than fresh water? Is the total amount of water on Earth always constant?