I'd say that 4-13 billion tons is a lot. Quick grab from the Wikipedia page re biomass. humans: ~0.1 billion tonnes domesticated animals: ~0.7 billion tonnes

I'd say that 4-13 billion tons is a lot. Quick grab from the Wikipedia page re biomass. humans: ~0.1 billion tonnes domesticated animals: ~0.7 billion tonnes earthworms: ~1 billion tonnes annual cereal crops: ~2.3 billion tonnes Antarctic krill: ~0.5 billion tonnes fish: 0.8-2.0 billion tonnes