Is marine mining a commercial viability for developing countries?

The green energy transition is projected to cause an increase in metal demand. Will this demand lead to the opening of deep-seabed mining? As of now, seabed mining has been limited to shallow waters, but could mineral-rich deep seabeds provide an opportunity for the developing world? 

Our studie for UNU-WIDER (United Nations University) is now published.

https://www.wider.unu.edu/publication/marine-mining-commercial-viability-developing-countries