How do surfactants work in stain removers?

(awarding brainliest)

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?

Why is permeable soil best for plants that need a lot of drainage?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.