This short piece of work differs with Professor Ellis.
Professor Ellis acknowledges that the size of the earth is fixed. However, the point of disagreement is that there is no need to exploit more lands as the ones already in use and technological innovations can sustain the growth in population. This is totally untrue because, despite the level of technological innovations and inventions, the lands have their limits. According to the SUNY College of Environmental Science and Forestry, overpopulation is a real threat to humanity as it has the potential to wipe out the entire mankind. Research in this institution has shown that the cumulative effects of overpopulation would be disastrous given the unforgiving character of Mother Nature (SUNY College of Environmental Science and Forestry). Sustainability can only be achieved if the population growth rate is matched by the growth rate of resources. In this case, there is need to increase the acreage of lands under cultivation so as to match population growth rate and consequently check overpopulation.