A group of high-profile CEOs on Thursday called on world leaders to agree to bring the balance of greenhouse gas emissions to zero by mid-century in a global climate change deal to be finalized in Paris in December. The leaders of Team B, a coalition about 12 CEOs and policymakers including Virgin [VA.UL] founder Richard Branson, Unilever chief Paul Polman and Tata International's [TATAI.UL] Ratan Tata, said a global net-zero emissions goal by 2050 will prompt businesses to embed new investments and clean energy research into their business strategies.