(b) Contributions of solid minerals to Nigerian economy:
(i) Revenue to the government
(ii) Income for workers
(iii) Generate employment
(iv) Source of foreign exchange
(v) Raw materials in industries
(vi) Facilitates infrastructural development
(vii) Facilitate growth of towns
(c) Problems facing the mining of solid minerals:
(i) Low level of technology
(ii) Inadequate skilled manpower
(iii) Inadequate capital
(iv) Inadequate infrastructure
(v) Competition from alternative sources
(vi) Illegal transactions/illegal mining/bunkering
(vii) Exhaustion or depletion of deposits