Which of the following is not an effect of the discovery of mineral resources in an area?

The effect of the discovery of mineral resources in an area can lead to an increase in wealth as more jobs are created, and there is an increase in economic activities. This often results in overcrowding as more people flock to the area in search of opportunities. Additionally, an increase in wealth can lead to an increase in the crime rate as people become more desperate to protect their newfound riches or to acquire them through criminal means. However, under-population is not an effect of the discovery of mineral resources. Instead, the discovery of mineral resources often leads to an increase in population as people move into the area in search of employment and economic opportunities.