Occasionally, a writer will use fancy large words in ornate sentences. The language draws attention to itself and distracts the reader from the message. The ramifications of the juxtapositon of those two chemicals was fortuitous.

Say things simply, so the reader understands precisely what you mean.

euphemisms.

Euphemisms put a positive spin on something. What was said: Johnny sometimes extends himself too much in class participation. What was meant: Johnny talks too much in class.

Always try to address issues directly.

redundancy.

Repeating the same words or ideas over and over may sometimes emphasize a point: The world has faced ecological crises and political crises... This a great tactic when it is planned. Planned repetition for emphasis is a good idea! Unplanned repetition (redundancy), when it is not planned, is boring and repetitious.