The Population Bomb examines the critical choices we face today and proposes an agenda for the 1990s to avoid global ecocide. The Population Explosion vividly describes how the Earth's population, growing by 95 million people a year, is rapidly depleting the planet's resources, resulting in famine, global warming, acid rain, and other major problems . Paul and Anne Ehrlich also clearly and concisely point to immediate action that will lessen the threat of ruin and begin to build a more peaceful, sane, and secure world.
Density is generally irrelevant to questions of overpopulation.
This more habitable portion is just a little over half the continent's area, giving an effective population density of 117 per square mile. That's still only about a fifth of that in the United Kingdom. In short, if the long-term carrying capacity of an area is clearly being degraded by its current human occupants, that area is overpopulated. By this standard, the entire planet and virtually every nation is already vastly overpopulated. Africa is overpopulated now because, among other indications, its soils and forests are rapidly being depleted and that implies that its carrying capacity for human beings will be lower in the future than it is now.