The pH of water determines the solubility (amount that can be dissolved in the water) and biological availability (amount that can be utilized by aquatic life) of chemical constituents such as nutrients (phosphorus, nitrogen, and carbon) and heavy metals (lead, copper, cadmium, etc.).
A huge Oa... A Major League Baseball team has 25 players on its active roster. Exactly how many of these are pitchers, and how many are position players, is up to the manager of each team and not dictated by rule. However, it is common for there to be 12 pitchers and 13 position players.
Certainly, the 25-man rosters of the 30 major league teams are diverse in other ways. Players of Latin descent made up 28.2 of players on MLB rosters at the start of the 2013 season. But a sharper, ground level view of diversity in sports may explain the 8.3 percent. The baseball landscape has changed in America since the days of Robinson, particularly the landscape of the backyard and the sandlot.