Bill Gates, other billionaires pledge $1 bn for clean energy
As many as 20 billionaires worldwide including Microsoft's Bill Gates, Amazon's Jeff Bezos and Alibaba's Jack Ma have together committed $1 billion towards clean energy. Called the 'Breakthrough Energy Ventures', the fund will invest the money for 20 years into risky, long-term energy technology to reduce greenhouse gas emissions. Virgin Group Founder Richard Branson has also backed the fund.