Why would you add a buffer to a reaction if all of the solutions are already neutral (pH 7)?

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

How have the greenhouse gasses increased from the year 2000 to 2018

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years