What is waste water treatment ?
“The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment.”
My source is from www.usgs.gov
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I think it's letter C or A
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Hypothesize that the ants are following a scent trail that the first ant left.
Hope it helps.
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The <em>erector</em><em> </em><em>spinae</em><em> </em>is NOT a muscle of respiration
