Bruce Bruso, president and CEO of CBA Environmental, explains how sewage sludge is converted into alternative energy at his plant in Hegins. He says sludge can reduce pollutants. PETE G. WILCOX/THE ...

Add Yahoo as a preferred source to see more of our stories on Google. Seattle airport is using a special cleaning technology to eradicate traces of PFAS. Washington will require the state's 11 ...

Municipal sludge is a by-product of wastewater treatment that is produced in massive quantities worldwide. Managing this material remains a growing environmental challenge. Traditional treatment ...

Yours truly has a neutral opinion regarding engine flushes: I believe engine flushes are only necessary when the engine has sludge buildup. Sludge is a dark and thick substance from contaminated oil, ...