Glossary: G

Here you will find definitions of terms used in resources on the Foodsource website. You will also find these definitions on the right-hand side within chapters. If you have any suggestions for new glossary items, let us know here.

A (12) | B (4) | C (12) | D (2) | E (7) | F (6) | G (3) | H (1) | I (5) | L (3) | M (10) | N (3) | O (3) | P (5) | R (1) | S (9) | T (1) | U (1) | W (4) | Y (1) | Z (1)

Generalist species

is a plant or animal species that is able to thrive in a large variety of environmental conditions, or that can live on a wide variety of foods. Members of the same generalist species can often be found at different parts of landscapes and in different regions of the world.


GHGs is an abbreviation for greenhouse gases. These include gases such as carbon dioxide, methane, and nitrous oxide, which are released as a result of human activity, and which trap heat within the earth's atmosphere, leading to global warming.

Global warming potential

The ratio of the total heat energy trapped by a unit of greenhouse gas (e.g. a tonne of methane) over a specific period of time (normally 100 years), to that trapped by an equal amount of carbon dioxide over the same time period. The global warming potential (GWP) of carbon dioxide, is therefore, always one. GWP is used to compare the warming effect of different gases on a common basis. It varies according to both the type of gas and the length of time considered.