How many hours a day the pump needs to be operated depends on the season and how much water is needed for crops.

VOA: special.2009.08.17

Before that time, submarines had operated on diesel fuel and electricity.

VOA: special.2010.06.11

Intel has operated on the Sabbath in Jerusalem for years, so it is not clear why the protests broke out now.

VOA: standard.2009.11.14