Organizers of the Davos forum say in a new report that machines are increasingly moving in on jobs done by people, projecting that more than half of all workplace tasks will be carried out by machines by 2025.

The World Economic Forum also predicts the loss of some 75 million jobs worldwide by 2022, but also says 133 million new jobs will be created.

The WEF said Monday: "Despite bringing widespread disruption, the advent of machine, robots and algorithm could actually have a positive impact on human employment."

The "Future of Jobs 2018" report, the second of its kind, is based on a survey of executives representing 15 million employees in 20 economies.

The WEF said challenges for employers include reskilling workers, enabling remote employment and building safety nets for workers.