The pH scale is a scale that is used to represent the level of acidity in a solution. A solution with a pH of 7 is neutral, while a solution with a pH below 7 is an acid, and a solution with a pH above 7 is a base. An acid dissociates, or breaks apart, and donates protons, or hydrogen ions, in an aqueous solution, while a base donates hydroxide ions in a solution. Water, for example, is neutral with a pH of 7. When acids are added, they release more hydrogen ions into the solution, and this causes the pH of the solution to drop.
Two days later, EA CEO John Riccitiello stated that Spore would be released sometime before the holidays. On February 12, 2008, Electronic Arts announced in an official press release that the official release date would be September 5, 2008 for Europe and September 7, 2008 for North America.
Milky Spore is a naturally occuring bacterium that affects Japanese Beetles at the grub stage of life. Milky Spore was first developed by the USDA in the 1930s to combat the Japanese Beetle but Milky Spore controls the June bug and Oriental beetles as well.