Glossary B
Deutsch: Bacillus thuringiensis / Español: Bacillus thuringiensis / Português: Bacillus thuringiensis / Français: Bacillus thuringiensis / Italiano: Bacillus thuringiensis
Bacillus thuringiensis (Bt) in the environmental context refers to a naturally occurring soil bacterium that is widely used as a biopesticide due to its insecticidal properties. This bacterium produces proteins that are toxic to many species of insects when ingested, making it a valuable tool for managing pests in agriculture, forestry, and in controlling mosquito populations to prevent disease transmission.
A Background concentrations: is In this context, EPA uses background concentrations to mean the contributions to outdoor Air Toxics concentrations resulting from natural sources, persistence in the environment of past years' emissions and long-range transport from distant sources.
Deutsch: Hintergrundaussterben / Español: Extinción de fondo / Português: Extinção de fundo / Français: Extinction de fond / Italiano: Estinzione di sfondo /
Background extinction is the normal extinction of various species as a result of changes in local Environmental conditions. Compare mass depletion, mass extinction.
A Background Level is
1. The Concentration of a substance in an Environmental media (air, water, or soil) that occurs naturally or is not the result of human activities.
2. In exposure
1. The Concentration of a substance in an Environmental media (air, water, or soil) that occurs naturally or is not the result of human activities.
2. In exposure
The Background radiation is the radiation arising from radioactive material other than that under consideration.