The issue focused attention at this week's TEDGlobal Conference on sustainable technologies and artificial intelligence.Leaders from tech giants Apple and Microsoft addressed the theme of artificial intelligence, discussing ways it could transform human tasks such as computing and delivering healthcare.Apple chief executive Tim Cook warned about "ethical breaches of privacy".Microsoft boss Satya Nadella urged firms to embrace artificial intelligence - calling it "the greatest breakthrough since the dawn of computing".AI researcher Professor Ian Levy warned it could threaten privacy."AI technology poses enormous ethical risks