The carbon storage potential of the great whales means they are worth millions to humanity

The concept of natural carbon sinks is satisfyingly simple: the vegetation and animals that inhabit our terrestrial and marine biomes draw carbon from the atmosphere for use in their tissues. Great whales (including blue, humpback and sperm whales, among others), are so prodigious that they sequester millions of tonnes of carbon each year – an ecosystem service that an analysis from the International Monetary Fund (IMF) suggests is worth millions of dollars per whale to humanity.

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