Nežiadúca pravda

Pokiaľ sa v blízkej budúcnosti nenájde spôsob ako produkovať viac potravinových komodít bez poškodzovania životného prostredia, potrava na Zemi bude čoskoro vyčerpaná. V súčasnosti sa potravinové komodity pestujú na ploche 60-krát väčšej než je v skutočnosti potrebné a polovicu sladkej vody spotrebujeme na ich zavlažovanie, tvrdí John Foley, z University of Minnesota.

If in the near future we do not figure out how to produce more food without harming the environment, the Earth's food supply will be exhausted in a few years. This is exactly what John Foley, head of the Environment Institute at the University of Minnesota, calls the "inconvenient truth".

Let us begin with some statistics. Today, 16 million square kilometers of land in the world is allocated for crops, which is comparable in size to South America. Pastures occupy nearly twice the area - 40 million square kilometers, the entire Africa. In general, agricultural lands occupy 40 percent of land. At the same time, Foley said, we use 60 times more land for growing food than is actually needed. In addition, half of the fresh water is used for agricultural purposes, the most part - for irrigation. All this coupled with the cutting down of forests and depletion of land makes agriculture the largest source of greenhouse gases. The manufacturing industry, transport and power are somewhere on the bottom of the list. "We have exhausted all the resources," says Foley. "We have exhausted the planet."

Článok: http://english.pravda.ru/business/companies/13-06-2012/121371-earth_population-0/

23.06.2012

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