The Global Population Situation - An Overview

While the facts of overpopulation are very challenging, remember: we can choose our future. Forecasts might lead you to believe that a population of 9,10, or even 11 billion is inevitable.  But a dramatic and voluntary reduction in births starting now can begin to create a more positive and sustainable future for out planet. See our "Help Us Now" section to learn what you can do!

  • World Population in 2015 reached 7.3 billion.
  • It has doubled in the past 45 years! Earth's population is increasing by over 140 people every minute ... equivalent to another Los Angeles plus another Chicago every month. Over the past few hundred years humanity's growth in sheer numbers has been truly explosive!

World population graph - future timeline

  • Right now, with over 7 billion of us:
    1. We are ravaging wildlife populations.  The number of mammals, birds, reptiles, amphibians and fish across the globe is, on average, about half the size it was 40 years ago.1
    2. We are rapidly losing farmland. An area of cultivated land the size of Iowa and Wisconsin combined (75 million acres) is lost every year due to soil erosion and urban sprawl.2
    3. We are rapidly destroying forests. Between 2000 and 2012 the Earth average a net loss every year of forested land about the size of Ohio (over 30 million acres).3
    4. We are consuming non-renewable resources - fossil fuels, minerals, and metals - at an enormous rate. Over time, these resources are decreasing in quality and increasing in cost. 
    5. We are depleting global groundwater over 3 times faster than rainfall can recharge aquifers.4  By 2025, 1.8 billion people will be living in countries or regions with absolute water scarcity, and 2/3 of the world population could be under water stress conditions.5
    6. We are causing soil salination and erosion at rates much faster than rates of natural soil restoration.
    7. We are over-fishing, acidifying, and polluting our oceans.6
    8. We are rapidly disrupting the relatively stable climate that human civilization and all other species have experienced for thousands of years through our greenhouse gas emissions. 
    9. We are creating massive amounts of waste and pollution.  Each of us contributes to: 1) proliferation of ocean "dead zones" and dying coral reefs; 2) rivers, lakes, and underground aquifers filling with industrial and agricultural pollution; 3) soil contamination; and 4) destruction and fouling of other species' habitats. 
    10. We are increasing a wide range of social problems: resource conflicts and wars; refugee migration; overcrowding and traffic congestion; dilution of representative democracy; increasing bureaucratic complexity and loss of personal freedoms; higher food, energy, and housing costs; and rising youth unemployment...that continue to worsen as our numbers increase by more than 70 million people every year. 
  • Over 2 billion people live on less than $2 a day - more than the population of the entire planet less than 100 years ago.7
  • Based on data from the Global Footprint Network, the Earth can generate renewable resources and absorb humanity's wastes for only about 2 billion people at an average European's level of consumption. It is important to understand that this analysis omits two tremendously important factors.  It does not factor in the alarming depletion of all the non-renewable resources such as fossil fuels, metals, and minerals that make industrial civilization possible. Second, the footprint calculation does not set aside significant habitat for other species.
  • If all countries followed the lead of countries with the lowest fertility rates - including Taiwan, Spain, Portugal, South Korea, and Poland - we could reach a global population of 3 billion by 2100!


1 -  World Wildlife Fund. "Living Planet Report 2014". Accessed October, 2015.

2 - UN Report to General Assembly, October 21, 2010.  Accessed September 2015.

3 - M.C. Hansen, P.V. Potapov, R. Moore, M. Hancher, S.A. Turubanova, A. Tyukavina, D. Thau, S.V. Stehman, S.J. Goetz, T.R. Loveland, A. Kommareddy, A. Egorov, L. Chini, C.O. Justice, and J.R.G. Townshend. "High-Resolution Global Maps of 21st-Century Forest Cover Change".  Science 342, no. 6160 (2013): 850-853.  Accessed October, 2015.

4 - Tom Gleeson, Yoshihide Wada, Marc F.P. Bierkins, Ludovicus P.H. van Beek.  "Water Balance of Global Aquifers Revealed by Groundwater Footprint". Nature 488, (2012): 197-200. Accessed October 2015.

5 - "Water Scarcity". United Nations.  Accessed October, 2015.

6 - FAO. 2012. The State of World Fisheries and Aquaculture 2012. Rome. 209 pp. Accessed October, 2015.

7 - "Poverty Overview". World Bank. Accessed October, 2015.