numan
What! Me Worry?
- Mar 23, 2013
- 2,125
- 241
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THE HUMAN FOOTPRINT IS NOT SMALL OR HARMLESS
Biomass
The total biomass of planet Earth (the total mass of all plants and animals and other organisms all over the world, on land and in the seas) is about 75 billion tonnes.
The total biomass of the human species is about 250 million tonnes, or about one part in 300 of the total biomass.
If the total biomass of 75 billion tonnes were to be spread evenly over the 500 million square kilometres of the surface of the Earth, it would form a film approximately one-tenth of a millimetre thick.
Quantifying and mapping the human appropriation of net primary production in earth's terrestrial ecosystems
In any one year, humans utilize, alter or consume between one-tenth to one-twentieth of the total biomass of the Earth, depending on how you analyze the figures.
.
THE HUMAN FOOTPRINT IS NOT SMALL OR HARMLESS
Biomass
The total biomass of planet Earth (the total mass of all plants and animals and other organisms all over the world, on land and in the seas) is about 75 billion tonnes.
The total biomass of the human species is about 250 million tonnes, or about one part in 300 of the total biomass.
If the total biomass of 75 billion tonnes were to be spread evenly over the 500 million square kilometres of the surface of the Earth, it would form a film approximately one-tenth of a millimetre thick.
Quantifying and mapping the human appropriation of net primary production in earth's terrestrial ecosystems
In any one year, humans utilize, alter or consume between one-tenth to one-twentieth of the total biomass of the Earth, depending on how you analyze the figures.
.