As countries scramble to procure personal protective equipment, another quickly accelerating problem sits on the back end: the disturbingly massive amount of medical waste of all types that must be disposed of. By Trista Bridges

Countries must harmonise research practices to truly understand the impacts of microplastics on people's health and develop well-informed regulations. By Tarun Anumol

Environmentalists need to be more conversant in business models and principles, while problem-solving engineers could benefit from engaging with natural and social scientists. The best solutions will emerge when students and researchers from different disciplines work together. By Justin Robertson and Danny Marks

Innovative partnerships provide the coaching, capital and connections needed to turn bright ideas into sustainable solutions. By Meg Wilcox