"levels"를 포함한 연어

the amount or concentration of emissions

a general term for the amount of ozone present, often reported in public health advisories

The amounts or concentrations of pesticides in a substance or environment.

the size or amount of the population

A more general term for the amount or concentration of CO2.

Refers to the measured amounts of radioactivity, often used in plural form in scientific contexts.

the degree or amount of efficiency

The amount or rate of sickness in a group or population.

the general amount or standard of rent in an area