Of the total area that is used by humans (Agriculture, Urban and Built-up Land),
- urban and built-up land is 1m km²,
- agriculture is 48m km²,
so agriculture is 48 of 49 millions km² used, that’s 98%. The remaining 2% are all streets and housing and other infrastructure together.


High elevation land in the Himalayas and South America is unusable. Also land in the arctic zone in Europe and North America.
Deserts are not actually barren.