a. Complete the notes for the environmental problem in exercise 8. Follow the example. Example: Source: The Ministry of Mines and Energy report in El Espectador. Citing the information: Information: Illegal mining of a mineral called Coltan ruined 5 km² of a nature reserve in three months. According to a report by the Ministry of Mines published in El Espectador, illegal mining of a mineral called Coltan ruined 5 km² of a natural reserve in three months. Source: Citing the information: Information:. According to.​