President Donald Trump's administration intends to overturn pollution rules aimed at reducing soot emissions from U.S.

PM2.5 is defined as fine particulate matter of 2.5 micrometers or less in diameter -- so small it can only be seen through an electron microscope -- but because it is so small bypasses filters in ...

Emisense Technologies, LLC today announced an agreement to commercialize next-generation sensors for particulate matter (PM) ...