It is due to absorption of CO2.
The pH goes lower in sour milk. See Related Links.
Salinity in oceans decrease when near a river because the river adds fresh water, which lowers the percentage of salt in the water, causing the salinity to decrease.
Evaporate the water by exposure to the sun and wind or in a cook pot.
Most water is found in the icebergs and glaciers floating around. The next highest amount of fresh water is found in the ground. (groundwater and aquifers)
According to the Fresh Water entry in Wikipedia:- Out of all the water on Earth, only 2.75 percent is fresh water, including 2.05 percent frozen in Glaciers, 0.68 percent as Groundwaterand 0.011 percent of it as Surface_waterin lakes and rivers.Freshwater lakes, most notably Lake_Baikalin Russia and the Great_Lakes_(North_Americain North America, contain seven-eighths of this fresh surface water. Swamps have most of the balance with only a small amount in rivers, most notably the Amazon_River.The atmosphere contains 0.04% water. In areas with no fresh water on the ground surface, fresh water derived from precipitation may, because of its lower density, overlie saline ground water in lenses or layers.Most of the world's fresh water is frozen in Ice_sheets.
oxygen form air is dissolved in water
fresh
It is about 6.7 (slightly acidic).
It was fresh ground that morning.
rain water is naturally slightly acidic im not sure about fresh water.
This pH is slightly basic.
:sit
In ground waters
Slightly salty.
3%
aquifer
Fresh pepper in a recipe usually refers to freshly ground peppercorns.