With an ever-increasing cost to extract dwindling raw materials, it's time to look at cities as urban mines. We're developing the tools to do that.
The continent needs investment – and China has long been providing it.
There will be huge environmental impact if we keep using raw materials as we did in the 20th century.
Researchers calculate whether we're using less materials, or whether we're just shipping it in from abroad.
Developed countries are using raw materials to sustain their economies at a much higher rate than that being captured in…