Secondo l’Economist, non è detto che si faccia un’azione “environmentally friendly” comprando cibo “organico”, per il semplice motivo che siamo in tanti, e sul pianeta non c’è abbastanza spazio per colture non intensive [1]:
Farming is inherently bad for the environment: since humans took it up around 11,000 years ago, the result has been deforestation on a massive scale. But following the “green revolution” of the 1960s greater use of chemical fertiliser has tripled grain yields with very little increase in the area of land under cultivation. Organic methods, which rely on crop rotation, manure and compost in place of fertiliser, are far less intensive. So producing the world’s current agricultural output organically would require several times as much land as is currently cultivated. There wouldn’t be much room left for the rainforest.
The Economist (per abbonati)
[1] L’articolo è vecchio di un paio di settimane, ma qui si stanno smaltendo gli arretrati. Ah, il gusto di leggere una rivista facendo credere che si sta lavorando.