First decimal place. Surface pH has decreased about 0.1 pH unit since the late 1800s.
So if it was 7.3, it's now 7.2? What are the actual numbers?
34 posted on 10/20/2005 1:26:36 PM PDT by Moonman62
(Federal creed: If it moves tax it. If it keeps moving regulate it. If it stops moving subsidize it)