蜜芽传媒

'Build bridges, airports and railways or get left behind,' warns report. The G20 group of most developed countries now has a Global Infrastructure Hub that has just produced a Global Infrastructure Outlook, weighing up the costs and benefits of big-build projects around the globe over the next 20 years. The report author Chris Heathcote explains why it's such a risky but vital business.

(Image: China bridge construction Credit: Getty Images)