Carl Fraas writes as early as in 1847, that climate and flora change in historical times. The first effect of cultivation is useful, but finally devastating through deforestation. The conclusion is that cultivation, when it proceeds in natural growth and is not consciously controlled, leaves deserts behind it: Mesopotamia, Persia, Greece. [Karl Marx, London, 25/3/1868 (2010, 42: 558-559)]
país: España
any: 1986
Yvert: 2462
usat:
![Carl Fraas writes as early as in 1847, that climate and flora change in historical times. The first effect of cultivation is useful, but finally devastating through deforestation. The conclusion is that cultivation, when it proceeds in natural growth and is not consciously controlled, leaves deserts behind it: Mesopotamia, Persia, Greece. [Karl Marx, London, 25/3/1868 (2010, 42: 558-559)]](https://encyclopaediaphilatelica.net/storage/uploads/Espana2462.jpg)