Population growth is the change in a population over time, and can be quantified as the change in the number of people in a population. The effects of population growth are varied and vast. While population growth may be beneficial to a certain extent, there may come a time when the number in the population exceeds the natural resources available to sustain it. The proponents of this study want to figure out the effect of human population growth in our environment in the global scale.
Migration may be one of the factors in population growth, but there are many other aspects in which people did not know. What will happen to those who are already peacefully living in an area then suddenly a number of people migrated there? As the population grows the opportunities for quality, available housing may become an issue. More people crowded into less space are not a good combination in any locality. As space is taken up, it becomes more valuable. Eventually, it begins to affect to poorest in the area. In the long run the effect of population growth may be substandard housing or homelessness. In other cases, access to food and clean water may be the main issue.
This is an even more immediate problem than housing. As more people are faced withunsanitary sources of food, disease and famine begin to take root. If left unaffected, it will sweep through an entire population. In some cases, nations may be affected by the situation. But aside from focusing on the negative side of the population growth the proponents also researched about the positive side of it. Positive effects of population growth include economic benefits such as an expansion of tax bases and increased consumer spending at local businesses, as well as innovations by cultures seeking to keep up with growing populations.