It has an effect on the speaker by using these repetitive words to get a point across that there is more to come because nevermore is kind of a synonym to the word anyway in some respects
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1. Changes in ocean temperatures and currents brought about by climate change will lead to alterations in climate patterns around the world. Changes in water temperature can affect the environments where fish, shellfish, and other marine species live. As climate change causes the oceans to become warmer year-round, populations of some species may adapt by shifting toward cooler areas oceans are becoming more acidic.
2. If we don’t fix it there’ll be more storms. When water is warmer, it evaporates at a faster rate which means the ocean will be able to cause even more powerful storms. This is obviously made worse by the rising sea levels.