However, CO2 has never been regulated as a pollutant under the Clean Air Act and does not pose any direct threat to human health unlike NOx, SO2 and mercury.
CO2 has never been regulated as a pollutant under the Clean Air Act.
CO2 has been regulated as a pollutant under the Clean Air Act.
The housing had only 2 people in it.
A man is looking over his shoulder.
the street is empty
A man is by others.
Four men are in costume.
They don't want their managers to be knowledable at all.