GLOSSARY 295
Grassland pasture and range: All open land used primarily for
pasture and grazing, including shrub and brush land types of
pasture; grazing land with sagebrush and scattered mesquite;
and all tame and native grasses, legumes, and other forage
used for pasture or grazing; because of the diversity in vegetative composition, grassland pasture and range are not always
clearly distinguishable from other types of pasture and range;
at one extreme, permanent grassland may merge with cropland
pasture, or grassland may often be found in transitional areas
with forested grazing land.
Grease car: A diesel-powered automobile rigged post-production
to run on used vegetable oil.
Greenhouse effect: The effect of certain gases in the Earth's atmosphere in trapping heat from the sun.
Greenhouse gases: Gases that trap the heat of the sun in the Earth's
atmosphere, producing the greenhouse effect. The two major
greenhouse gases are water vapor and carbon dioxide. Other
greenhouse gases include methane, ozone, chlorofluorocarbons, and nitrous oxide.
Grid: An electric utility company's system for distributing power.
Gross: When used with respect to acres or wells, refers to the total
acres or wells in which a company, individual, trust, or foundation has a working interest.
Growing stock: A classification of timber inventory that includes
live trees of commercial species meeting specified standards of
quality or vigor; cull trees are excluded.
H
Habitat: The area where a plant or animal lives and grows under
natural conditions. Habitat includes living and non-living attributes and provides all requirements for food and shelter.
Hardwoods: Usually broad-leaved and deciduous trees.
Heating value: The maximum amount of energy that is available
from burning a substance.
Heavy oil (heavy crude oil): Oil that is more viscous that conventional crude oil, has a lower mobility in the reservoir but can be
recovered through a well from the reservoir by the application
of a secondary or enhanced recovery methods.
Hectare: Common metric unit of area, equal to 2.47 acres.
100 hectares = 1 square kilometer.
Grassland pasture and range: All open land used primarily for
pasture and grazing, including shrub and brush land types of
pasture; grazing land with sagebrush and scattered mesquite;
and all tame and native grasses, legumes, and other forage
used for pasture or grazing; because of the diversity in vegetative composition, grassland pasture and range are not always
clearly distinguishable from other types of pasture and range;
at one extreme, permanent grassland may merge with cropland
pasture, or grassland may often be found in transitional areas
with forested grazing land.
Grease car: A diesel-powered automobile rigged post-production
to run on used vegetable oil.
Greenhouse effect: The effect of certain gases in the Earth's atmosphere in trapping heat from the sun.
Greenhouse gases: Gases that trap the heat of the sun in the Earth's
atmosphere, producing the greenhouse effect. The two major
greenhouse gases are water vapor and carbon dioxide. Other
greenhouse gases include methane, ozone, chlorofluorocarbons, and nitrous oxide.
Grid: An electric utility company's system for distributing power.
Gross: When used with respect to acres or wells, refers to the total
acres or wells in which a company, individual, trust, or foundation has a working interest.
Growing stock: A classification of timber inventory that includes
live trees of commercial species meeting specified standards of
quality or vigor; cull trees are excluded.
H
Habitat: The area where a plant or animal lives and grows under
natural conditions. Habitat includes living and non-living attributes and provides all requirements for food and shelter.
Hardwoods: Usually broad-leaved and deciduous trees.
Heating value: The maximum amount of energy that is available
from burning a substance.
Heavy oil (heavy crude oil): Oil that is more viscous that conventional crude oil, has a lower mobility in the reservoir but can be
recovered through a well from the reservoir by the application
of a secondary or enhanced recovery methods.
Hectare: Common metric unit of area, equal to 2.47 acres.
100 hectares = 1 square kilometer.