The leather sector has the potential to become a big export earner for Zambia, but only if bottlenecks in the supply chain are eradicated, said a survey from the Export Board of Zambia (EBZ). The survey, commissioned by the World Trade Organisation (WTO) and the United Nations Conference on Trade and Development (UNCTAD), indicated that for the sector to grow, producers must have access to affordable credit and technical assistance that would improve productivity and quality assurance.