Full Idea
The combined mass of homo sapiens is about 300 million tons; the mass of all domesticated farmyard animals is about 700 million tons; the mass of the surviving larger wild animals (from porcupines up) is less than 100 million tons.
Gist of Idea
People 300m tons; domesticated animals 700m tons; larger wild animals 100m tons
Source
Yuval Noah Harari (Sapiens: brief history of humankind [2014], 18 'Permanent')
Book Reference
Harari,Yuval Noah: 'Sapiens: a brief history of Humankind' [Vintage 2014], p.392
A Reaction
These really are figures that deserve much wider currency. Every school entrance hall needs a board with a few of the basic dramatic statistics about human life on Earth.