Mali was known for its ample reserves of gold, unlike ancient meroe in east africa, which was known for its iron. which of the problems might have faced the malians if they had iron rather than gold?

It is estimated that the gold reserves of the mining companies operating in Mali could reach 600 tons in 2015. The reserves of the mining companies present in Mali are equivalent to 12 years of gold mining production at the current rate of 50 tons per year according to data from the Ministry of Mines of Mali.

Mali is the third largest gold mining country in Africa behind South Africa and Ghana. Precious metal revenues are the main source of foreign currency for Mali.

For the aforementioned, Mali, currently faces humanitarian problems, which have to do with the exploitation of people in mining activity, environmental pollution and corruption that does not allow the advancement of society. In the event that this country changes its gold reserves for iron, it would have the same problems, since iron is very required in heavy industry in the international market, therefore, it would continue to suffer from the current problems.

the underground railroad (apocope of the metropolitan railroad) is a system of urban trains located within a city and its metropolitan area. it is characterized for being a massive transport of passengers in the big cities, uniting diverse zones and their environs, with high capacity and frequency and in segregated form to other systems of transport. metropolitan railroads are built underground or on the surface, although most systems use mixed models where sections are combined in both modalities.

1 - as a result, the metro tends to reduce car travel for two reasons: first, due to the greater transfer of users from the car and, second, due to the reduction in the acquisition of cars in homes located in sectors near the stations of the metro.

2 -the metro allows to contribute effectively to the achievement of all the objectives of an urban development policy: it improves the efficiency of the city's economy by reducing travel costs and also generates a higher level of activities in the city center, taking advantage of of the agglomeration economies.

3 -it is a clean means of transport, since it uses renewable energy (usually electricity), taking care of the environment and avoiding excessive pollution.