Article: The impact o population growth on wildlife
source: http://www.wiserearth.org/article/4a6a974767eaa14611a1aa2699d03fe4/new/1/group/humanoverpopu...
Ten thousand years ago, the mass, the weight, all of the humans on the earth, plus all our pets, plus all the livestock we keep to feed ourselves, was 0.1% of 1% - one tenth of one percent - of the mass, the weight, of all the mammals on the earth. The rest of the mammals - elephants and tigers and rhinos and whales and kangaroos etc - made up 99.9% of the mass of all the mammals on the earth.
By 200 years ago, humans, our pets and our livestock had increased from 0.1% to 10-12% of the mass of the mammals of the earth.
Now, we, our pets and our livestock make up 96% - 98% of the mass of the mammals of the earth. The poor old elephants and tigers and rhinos and whales and kangaroos and all the rest of the mammals have gone from 99.9% to just 2 - 4%.
By 200 years ago, humans, our pets and our livestock had increased from 0.1% to 10-12% of the mass of the mammals of the earth.
Now, we, our pets and our livestock make up 96% - 98% of the mass of the mammals of the earth. The poor old elephants and tigers and rhinos and whales and kangaroos and all the rest of the mammals have gone from 99.9% to just 2 - 4%.
