Jones and Cassidy went on to play mother and son on The Partridge Family, which debuted in the fall of 1970. Danny Bonaduce and Susan Dey were also key members of the cast.
Sour crude oil. Sour crude oil is crude oil containing a high amount of the impurity sulfur. It is common to find crude oil containing some impurities. When the total sulfur level in the oil is more than 0.5% the oil is called sour.
Recently passed rules on sulfur content could raise the demand for sweet crude oil -- a type of crude oil with less sulfur -- but sweet crude oil is less common than other types of oil. And laws aimed at preventing climate change will likely raise the price of energy, too [source: Murphy ].