How single-stream recycling works — and how your choices can make it work better

The Conversation reports on single-stream recycling, emphasizing its convenience but noting significant contamination issues ...
Nature

How to build a circular economy for rare-earth elements

Yong Geng is a professor of environmental management at the School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Joseph Sarkis is a professor of ...