Worldwide, more than 90 percent of mankind’s calorie requirements are now met by just 103 plant species, and more than half the global energy intake comes from only three major crops ​ — rice, wheat, and maize.
Rohkem kui 90 protsenti inimese kalorivajadusest saadakse praegu ainult 103 taimeliigist ning rohkem kui pool maailmas tarvitatud energiast saadakse vaid kolmest peamisest viljast – riisist, nisust ja maisist.