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.
Sweet vs Sour Crude. Although there are many other classifications of oil like with respect to its molecular weight (light versus heavy crude oil), two classifications are usually confused with each other. These are the sweet and the sour crude oils. Foremost, it is best to define what crude oil really is. This oil is practically equal to what is known as unrefined oil. But with regard to discerning the sour and sweet crude types, the primary difference between the two is in their sulfur content. It is important to note though that the fewer the sulfur in the oil, the friendlier it becomes to the environment.