Definitions - i

Ice Core

Carbon Pollution refers to the human produced Co2 that is meant to be harming the environment.


The trouble is Co2, in of itself, is not a pollutant, it's a critical element to the majority of life on the Earth via the Oxygen/Co2 exchange between plants and animals. Too little Co2 in the atmosphere will result in the breakdown of this cycle and asphyxiation of most life on the Earth, the critical low point is around 100 ppm (parts per million); before the recent increase in Co2, we were down to 150 ppm. At low levels of Co2 in the atmosphere plants do not thrive or grow as quickly at higher levels (this is why greenhouses pump in Co2 to speed up plant growth).

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Ice Shelf

A thick mass of ice extending from a polar shore. The seaward edge is afloat and sometimes extends hundreds of miles into the sea.

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Immunotoxicity

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.

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Impervious

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

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Incident Light

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

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Incineration

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Indian Summer

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

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Indoor Air Quality

The supply and introduction of adequate air for ventilation and control of airborne contaminants, acceptable temperatures and relative humidity.

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Induction Generator

A variable speed multi-pole electric generator.

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Infiltration

Leakage of ground water into a sewage collection system.

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Infra-red Radiation

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.

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Ingeo

Made from plant sugars from corn. Firstly the sugar is fermented, then transformed into a polymer called polylactide.

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Inoculum

  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.

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Insecticide

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Insolation

The solar power density incident on a surface of stated area and orientation, usually expressed as Watts per square meter or Btu per square foot per hour. See diffuse insolation and direct insolation.

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Insulating Walls

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.

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Intelligent Materials

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.

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Intercropping

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.

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Invasive

Global warming is the name given to the theory that there is increase in the average temperature of the Earth surface air and oceans since the mid-20th century and its projected continuation.

The exact mechanism of warming is not precisely understood, although it is strongly suspected that Greenhouse gases are to blame, as increasing concentrations of such gases help trap heat in the atmosphere and so raise mean temperatures.

Wikipedia Entry

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Inversion

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

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Inverter

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IPCC

(UN) Intergovernmental Panel on Climate Change.

Website

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Irradiance

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

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Irradiated Food

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

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Isotherms

Lines connecting points of equal temperature on a weather map.

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A free Android app containing all these definitions is now available, called the Green Dictionary. Click here to see the entry on the Android market; or click here if on an Android phone.