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aa

aa   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Volcanic **lava rock that is thick and porous and has a rough, jagged surface when it cools. It

abandoned well

abandoned well   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Any *well that has not been used for a long time and/or is not properly sealed, and is so

abatement

abatement   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The elimination or reduction of emissions that create *pollution. Examples include smoke abatement and noise abatement.

abatement debris

abatement debris   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Waste materials produced by *remediation activities.

Abbey, Edward

Abbey, Edward (1927–89)   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

who wrote the book *Desert Solitaire and is remembered for his strong criticism of public land policies and his

abiotic

abiotic   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Devoid of life, not *biotic, non‐biological. That part of a natural environment that comprises only chemical or physical

ablation

ablation   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

1. The process by which *snow or *ice is lost from a *glacier or *ice cap

ablation zone

ablation zone   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The lower part of a *glacier, where in the course of a year more ice is lost by

abrasion

abrasion   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The *physical weathering or mechanical weathering of rock or sediment by running water, glaciers, or wind loaded with fine

absolute age

absolute age   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Age that is expressed in number of years, rather than age relative to a particular event. In geology absolute age

absolute chronology

absolute chronology   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

A *chronology that determines the age of a feature or event in years. Contrast relative chronology.

absolute dating

absolute dating   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

A range of methods for determining the *absolute age of an object or material, for example using *radiometric

absolute humidity

absolute humidity   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

A measure of *humidity, or the actual mass of *water vapour in a given volume of air,

absolute instability

absolute instability   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The meteorological condition in which a rising *parcel of air continues to rise because the *dry adiabatic lapse

absolute poverty

absolute poverty   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

An extreme state of *poverty, in which the standard of living is below the minimum that is needed

absolute relief

absolute relief   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The maximum elevation of a particular area above *sea level. Contrast relative relief.

absolute scarcity

absolute scarcity   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

A condition that exists when there is not enough of a *resource in existence to satisfy existing demand for

absolute zero

absolute zero   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

A temperature of −273.15°C, −459.67°F, the zero point on the *Kelvin temperature scale, at which atomic and molecular motion

absorb

absorb   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

To take something in (such as the penetration of a solid substance by a liquid, by capillary, osmotic, solvent, or

absorbed dose

absorbed dose   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The amount (*dose) of a chemical substance that is absorbed by, and thus enters the body of,

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