5. China is spending heavily on renewable and nuclear energy as it tries to slow the growth of coal, but despite those efforts it has become by far the largest emitter of greenhouse gases. Its emissions of 10 billion tons a year of carbon dioxide from the burning of fossil fuels and cement manufacturing are almost twice those of the United States, though emissions per person are still far higher in the United States.
6. Internet tycoons had heated discussions on the promise of artificial intelligence (AI) following the historic victory earlier this month for Google Inc's AI-powered AlphaGo over South Korean Go master Lee Se-dol.