Question:
How many billion tons productivity of oceans?
How many billion tons productivity of oceans?
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Despite low productivity per unit area, oceans contribute significantly due to their vast expanse — about 55 billion tons.
Updated On: Jul 17, 2025
- 55
- 70
- 155
- 170
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The Correct Option is A
Solution and Explanation
The ocean’s net primary productivity is approximately 55 billion tons (gigatons) of organic matter annually.
Though oceans cover ~70% of Earth's surface, their productivity per unit area is less than terrestrial ecosystems, but total contribution is large due to vast area.
Though oceans cover ~70% of Earth's surface, their productivity per unit area is less than terrestrial ecosystems, but total contribution is large due to vast area.
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