A new analysis of whales suggests that each one is worth about $2 million in carbon sequestration — and the global population is thus worth about $1 trillion.
How do whales sequester carbon? By eating stuff, getting big, then drifting to the bottom of the ocean after they die. This makes them carbon sinks on a scale even bigger than most trees
Source: Whales worth about $1 trillion in carbon sequestration, analysis finds