North America is one of the six continents of planet Earth, its area is relatively small – approximately 24 million square kilometers. Despite the small size of North America, on its territory, both on land and in the bowels of the ocean washing it, there is truly a huge number of different types of minerals: coal, various ferrous and non-ferrous metals, gold and mercury. Such richness in deposits is explained by the structure of the mainland and the displacement of the plate on which the mainland is located.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.