| Adult |
|
| Age |
Median age of a population, in years |
| C |
Average Consumption per person in a group |
| Capacity |
Total amount of ecological resources available to, and used by, a group (see Rtotal) |
| Cap/p |
Capacity per person |
| Child |
|
| C-low |
Simulation that reduces consumption at a roughly constant rate to offset external impact |
| Consumption |
Ecological footprint of a group expressed in ecological resources |
| cum, cumulative |
Sum of values for a variable as a function of another variable |
| $ current |
Monetary value (in U.S. dollars) of something in a given year |
| Death Rate |
Deaths per year as a fraction of the population |
| Ecological footprint |
Measure of ecological products and services used by humanity, typically expressed as a unit of land area |
| Ecological resource |
Unit of ecological footprint corresponding to an average person's annual basic needs |
| Efficiency, E |
Variable reflecting the distribution of population in a group |
| Emissions |
Amount of carbon dioxide equivalent greenhouse gas emitted by humans per year in megatonnes |
| Epoch |
Period of time corresponding to when part of a group is in a given phase |
| Global variable |
A variable that describes a charcteristic of interest for one or more groups |
| Green |
The simulation that is the best match to historical values of global variables before COVID-19 pandemic |
| Green" |
The simulation that is the best match to historical values of global variables during COVID-19 pandemic |
| Group |
A set of people and their environment with specific population, consumption, and capacity |
| GWP |
Gross World Product in U.S. dollars (2010 value unless otherwise indicated) |
| GWP/p |
Average GWP per person in U.S. dollars (2010 value unless otherwise indicated) |
| Happiness, H |
Life satisfaction of members of a group (on a scale from 0 to 1, typically expressed in %) |
| Impact |
Amount of reduction of total ecological resources (Capacity) by a non-human source that is triggered by human activity. |
| Inflation |
Ratio of monetary value of something in one year to its monetary value in another year |
| Life Expectancy, L |
Expected lifetime (in years) of a person or group born in a given year |
| Longevity |
The amount of time until a group consumes its habitat at the current rate. |
| Max Phase |
The maximum phase in a group |
| Min Phase |
The minimum phase in a group |
| Mixed group |
A group resulting from interaction of groups based on maximum weights of population, consumption, and capacity |
| Needs |
Maximum ecological resources consumed for basic survival |
| Normalized |
Expressed as a fraction of a given value (such as the maximum expected value or value in a given year) |
| Normalized Population / Nature |
Sratio / 1.126; also: Sr |
| P |
Cumulative population as a function of a variable such as phase (P = E^Phratio - E). |
| Phase |
Activity type; each phase is expressed as a fraction of its Sr range |
| Phase Ratio, Phratio |
Phratio = (Max Phase - Phase) / (Max Phase - Min Phase) |
| Pmax |
Maximum world population as a function of Sratio |
| Population |
The number of individuals (typically people) in a group |
| Population Efficiency |
Variable affecting the distribution of population in a group |
| R |
Total amount of ecological resources consumed by a group |
| Rdiff |
Amount of total wants consumed by a given group |
| Region |
An arbitrary collection of resources and people (also group) |
| Resource |
Ecological resource |
| Rs, Habitat |
Amount of ecological resources remaining in a region or the world, usable by people and other species |
| Rtotal |
Capacity |
| $Convert |
Global inflation of U.S. dollars, as multiple of a value in 2010 |
| Simulation |
Set of mathematical projections of observable variables (typically global variables) that define a universe |
| Sr |
Normalized Population / Nature |
| Sratio |
Ratio of minimum consumption by people (needs) to remaining resources Rs |
| State |
The combined characteristics of an entity (such a group) based on the values of a set of global variables |
| Summed group |
A group with the sums of interacting groups' population, consumption, and capacity |
| $T |
Trillion U.S. dollars |
| Total consumption |
Consumption of everyone in a group |
| Temperature |
Mean annual global atmospheric temperature anomaly (difference from 1810) in degrees Celsius |
| Universe, world |
Theoretical reality defined by a simulation, based on history in the real world |
| Variable |
A mathematical quantity whose value is based on the values of other quantities |
| Wants, Waste |
Resources consumed for purposes other than needs |
| Wealth |
Wealth in U.S. dollars (2010 value unless otherwise indicated) |
| Wealth/p |
Average wealth per person in U.S. dollars (2010 value unless otherwise indicated) |
| Weight |
Multiplier of a variable used to calculate the value of another variable |
| Weighted group |
A group resulting from groups interacting based on weights of population, consumption, and capacity |
| World group |
All the people and regions in the world identified as one group |
| Year |
Middle of given calendar year (A.C.E.) |