They say that ocean species, one by one, are being pushed to extinction, a phenomenon driven by the advances in satellite and sonar technology, which ocean  going fishing fleets use to locate fish
१९५० च्या दशकाच्या शेवटी, झपाट्याने वाढलेल्या लोकसंख्येमुळे होणारी अन्‍नटंचाई टाळण्यासाठी गहू आणि तांदूळ यांच्या अधिक उत्पादन देणाऱ्‍या जाती वापरण्यात आल्या.