World population growth

6 billion in 1999 (12 years) 7 billion in 2013 (14 years—projected) 8 billion in 2028 (15 years—projected) r 1 

7 (high) or 8.9 (middle) or 7.3 (low) billion projected for 2050 Black Death the Plague 1  

FIGURE 19.1 The T-shaped curve of past exponential world population growth, with projections 

In 2002 noted biologist Edward O. Wilson provided the following statement in his book The Future of Life. 

The ecological footprint—the average amount of productive land and shallow sea appropriated by each person in bits and pieces around the world for food, water, housing, energy, transportation, commerce and waste absorption—is about 2.5 acres in developing nations but about 24 acres in the U.S. The footprint for the total human population is 5.2 acres. For every person in the world to reach present U.S. levels of consumption with existing technology would require four more planet Earths. 

---

V., New York, 1994, 830 pp. Part 1 examines world population growth, agricultural production, and food suppHes Part 2 presents the development of... 

Helleday T, Tuominen KL, Bergman A, Jenssen D (1999) Brominated flame retardants induce intragenic recombination in mammalian cells. Mutat Res 439 137-147 Hern J, Feltz HR (1998) Effects of irrigation on the environment of selected areas of the Western United States and implications to world population growth and food production. J Environ Manage 52 353-360... 

Predictions of atmospheric CO2 change depend not only on choices concerning future energy sources but also on the rate of world population growth, and the ultimate maximum energy consumption per capita. These estimates are difficult to make, but various scenarios have been developed to provide some limits on future CO2 concentrations. 

FIGURE 2.1 Relationship between estimated world population growth and amount of time required to circumnavigate the globe (similar to Murphy and Nathanson 1994, with current population estimates from U.S. Census Bureau 2007). 

Such increases are vital in the face of exponential world population growth and the need for a corresponding level of growth in the world food supply (15). 

The world population in 1980 was about 4.432 billion and growing at a rate of 1.7% (Alociija, 2002). Modeling world population growth as an exponential process,... 

In fact, the rate of energy use from all sources has been growing even faster than world population growth. Thus, from 1970 to 1995 energy use increased at a rate... 

Figure 2.1. World Population Growth Trends, Fueling the Need for More Food cind Nutrients.

The increased demand for papers also comes from world population growth and from the need to protect products and materials consumed by that population. As a result, the production capacity of the paper industry s resource base has been stressed, raising demands for conservation and recycling. The recycling industry now recovers billions of tons of recyclable paper products annually, to serve as feedstock for remanufactuiing. 

Continuing world population growth, primarily in developing countries where GDP/capita is currently low coupled to... 

Population growth in industrialized countries has essentially stopped and world population growth has shifted almost entirely to the countries of Africa, Asia, and Latin America. Currently, of the 83 million people added to global population each year by the difference between births and deaths, only 1 million are in the industrialized countries. The developing world s population is projected to increase by 2.9 billion by 2050, compared with only 49 million in the more developed countries [19],... 

As a classical example, we will look at the industrial synthesis of nitric acid, a compound whose production revolutionized the fertilizer industry, and the world population growth is strongly correlated with the amount of nitric acid (or ammonia) synthesized. 

Figure 8.2 World population growth. From World Health Organization data.

---