Study reveals that decent living standards for 8.5 billion people possible with only 30% of current global resource and energy use.

From the abstract

With this approach, good lives can be achieved for all without requiring large increases in total global throughput and output. Provisioning decent living standards (DLS) for 8.5 billion people would require only 30% of current global resource and energy use, leaving a substantial surplus for additional consumption, public luxury, scientific advancement, and other social investments.