Definitions - i

A cylindrical section of ice removed from a glacier or an ice sheet in order to study climate patterns of the past.

Any change to the environment whether adverse or beneficial, wholly or partially resulting from human activity, industry or natural disasters.

Adverse effects on the normal functioning of the immune system, caused by exposure to a toxic chemical. Changes in immune function could produce higher rates of infectious diseases or cancer, or more severe cases of those diseases. Immunotoxic chemicals can also cause auto-immune disease or allergic reactions.

Refers to a surface that promotes storm water runoff instead of infiltration into the ground.

Light that shines onto the face of a solar cell or module.

Substance, especially man-made, that pollutes or contaminates an environment.

An unseasonably warm spell with clear skies near the middle of autumn. Usually follows a substantial period of cool weather.

Any change to the environment whether adverse or beneficial, wholly or partially resulting from human activity, industry or natural disasters.

A variable speed multi-pole electric generator.

Any change to the environment whether adverse or beneficial, wholly or partially resulting from human activity, industry or natural disasters.

The heat energy that is emitted from all solids, liquids, and gases. In the context of the greenhouse issue, the term refers to the heat energy emitted by the Earth's surface and its atmosphere. Greenhouse gases strongly absorb this radiation in the Earth's atmosphere, and re-radiate some back towards the surface, creating the greenhouse effect.

Any change to the environment whether adverse or beneficial, wholly or partially resulting from human activity, industry or natural disasters.

1. Bacteria or fungi injected into compost to start biological action.
2. A medium containing organisms, usually bacteria or a virus, that is introduced into cultures or living organisms.

Any change to the environment whether adverse or beneficial, wholly or partially resulting from human activity, industry or natural disasters.

Insulating walls may use light but effective insulating materials such as fiberglass batts, strawbale or foam; or from heavier materials which have the benefit of good thermal mass, storing heat or coolness, e.g. stone, or earth construction, or insulating concrete forms.

Materials that are able to adapt to their environment by altering their properties. Examples of intelligent materials include liquid crystal glass which changes from transparent to opaque upon application of a current, and thermo-chromic glazing that changes transparency in response to ambient temperatures.

Intercropping is the practice of growing two or more crops in close proximity. The most common goal of intercropping is to produce a greater yield on a given piece of land by making use of resources that would otherwise not be utilized by a single crop. Careful planning is required, taking into account the soil, climate, crops, and varieties. It is particularly important not to have crops competing with each other for physical space, nutrients, water, or sunlight. Examples of intercropping strategies are planting a deep-rooted crop with a shallow-rooted crop, or planting a tall crop with a shorter crop that requires partial shade.

Any change to the environment whether adverse or beneficial, wholly or partially resulting from human activity, industry or natural disasters.

A layer of warm air that prevents the rise of cooling air and traps pollutants beneath it; can cause an air pollution episode.

Any change to the environment whether adverse or beneficial, wholly or partially resulting from human activity, industry or natural disasters.

Any change to the environment whether adverse or beneficial, wholly or partially resulting from human activity, industry or natural disasters.

The direct, diffuse, and reflected solar radiation that strikes a surface. Usually expressed in kilowatts per square meter. Irradiance multiplied by time equals insolation.

Food subject to brief radioactivity, usually gamma rays, to kill insects, bacteria, and mold, and to permit storage without refrigeration.

Lines connecting points of equal temperature on a weather map.