Phrases with «background levels»

Related phrases

Sentences with «background levels»

  • In some areas, the saturation levels reached at least 250 times that of background levels in the summer and 1,400 times higher in the winter. (skepticalscience.com)
  • At some locations, methane concentrations reached 100 times background levels. (realclimate.org)
  • There are usually several such plots on one site, some with elevated CO2 and a number of control plots in which CO2 remains at normal background levels. (carbonbrief.org)
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