Glossary A
Acidity may be defined as the quality, state or degree of being acid ; or the level of acid in a substance.
Acidity is measured in pH, or the negative log of the activity of the hydrogen ion in an aqueous solution. Solutions with a pH less than 7 are said to be acidic. The pH of an aqueous substance can be measured using a glass electrode and a pH meter, or with the use of pH indicators .
Or a more chemical definition: Acidity is a measure of the number of free hydrogen ions (H+) in a solution that can chemically react with other substances.
Deutsch: Akronym / Español: Acrónimo / Português: Acrônimo / Français: Acronyme / Italiano: Acronimo
Acronym in the environmental context refers to a shortened form of a name or phrase that is created using the initial letters of the words within that phrase. These acronyms are commonly used in environmental science, policy, and management to simplify the communication of complex terms, organizations, technologies, or regulations. Acronyms help professionals in the field convey information more efficiently, especially in documents, reports, and discussions where long or complex names might be cumbersome.
Deutsch: Aktion / Português: Action / Français: Action / Italiano: Action
In the environmental context, "action" refers to activities and initiatives taken to address environmental problems and promote sustainable practices.
Deutsch: Aktionsstufe / Español: Nivele de Acción / Português: Níveis de Ação / Français: Niveaux d'Action / Italiano: Livelli di Azione /
The term action level refers to a specific level of concentration of a toxic substance, contaminant or radiation that when met or exceeded, is considered dangerous enough for remedial or regulatory action by a governing body or other authority to be warranted.