Q: I live in the San Leandro hills, where there is clay soil. Last week, water backed up into my toilets, tub and shower. A plumber tried to remove the obstruction but was unsuccessful. He returned ...

LOGAN, Ohio — In a factory outbuilding at Logan Clay Products Co., two workers try to answer a question with a mechanical press: How tough is this clay pipe? The machine makes contact with the ...

SEVENTY per cent of the fresh water resources are being used for agricultural production while the rest for drinking, municipal, industrial uses etc. The increasing demand for food and fibre calls for ...