Whales, particularly baleen and sperm whales, are among the largest creatures on Earth. Their bodies are enormous stores of carbon, and their presence in the ocean shapes the ecosystems around them.
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Whoever wrote this has zero sense of the scale of the Earth. Unless the number of whales in the ocean is in the billions, their presence or absence has zero effect on the Earth. There are, by the way, about 25,000 Blue Whales on the planet.
It seems they are innumerate hacks.