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Today, over 90% of all used materials are discarded, leading to a great acceleration of waste and widespread and often inequitable socio-environmental challenges. This Voices asks: how can we sustainably manage waste to alleviate its socio-environmental footprints for a circular and inclusive future?

This commentary lays out four challenges that currently prevent capital markets from contributing to a socially and environmentally sustainable economy. It reflects on how these can be turned into opportunities and the role of transdisciplinary research and action in promoting such change.

This paper uses a monopolistic competitive framework to study the impact of trade liberalization on local and global emissions. We focus on the interplay of asymmetric emission taxes and the home market effect and show how a large-market advantage can counterbalance a high emission tax, so that trade liberalization leads firms to move to the large high-tax economy. Global emissions decrease when trade is liberalized in this case. We then simulate the model with endogenous taxes. The larger country, which has the advantage of the home market effect, will be able to set a higher Nash emission tax than its smaller trade partner yet still maintain its manufacturing base. As a result, a pollution haven will typically not arise in this case as trade is liberalized. However, global emissions increase as a result of international tax competition, which underscores the importance of international cooperation as trade becomes freer.