Glossary P

The Environmental Glossary. Letter P +++ Popular Articles: 'Peak power', 'Parallel connection', 'Pollution'

The Performance Curve is the probability of deciding that the parameter of interest is greater than action level over the range of possible population parameters and which is used to assess the goodness of a test or to compare two competing tests; similar in concept to a statistical power curve

Permafrost is the perennially frozen layer of the soil that forms when the water there freezes.

A Permeability is the degree to which groundwater can move freely through an Aquifer measured by the interconnection of pores and fractures
Other /More definition:
A permeability is the ability of a material to allow the passage of a liquid, such as water through rocks.

A Peroxyacetyl nitrate (PAN) is Pollutant created by action of UV component of sunlight on Hydrocarbons and NOx in the air; an ingredient of photochemical smog.

Perpetual resource is an essentially inexhaustible resource on a human time scale. Solar Energy is an example. Compare nonrenewable resource, renewable resource.

Deutsch: Person / Español: Persona / Português: Pessoa / Français: Personne / Italiano: Persona
A person is a being, such as a human, that has certain capacities or attributes constituting personhood, which in turn is defined differently by different authors in different disciplines, and by different cultures in different times and places.

Deutsch: Schädlingsbekämpfung / Español: Manejo de plagas / Português: Manejo de pragas / Français: Gestion des ravageurs / Italiano: Gestione dei parassiti

Pest management in the environmental context refers to the practices and methods used to control or eliminate populations of organisms considered pests, which can negatively impact agriculture, forestry, human health, and the environment. Effective pest management aims to reduce or mitigate the adverse effects of pests in a way that is sustainable, minimizes environmental impact, and conserves non-target species and overall biodiversity.

Deutsch: Pestizid / Español: Pesticida / Português: Pesticida / Français: Pesticide / Italiano: Pesticida /

A Pesticide is a general name for agricultural chemicals that include:

A PESTICIDE USAGE is Refers to actual applications of pesticides, generally in terms of quantity applied or units treated.

A Pesticide User Expenditures is Dollar value of purchases by persons or businesses applying pesticides, such as farmers, commercial pesticide applicators and homeowners.

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