Typically, the amount of electricity a computer uses is between 65 watts and 250 watts. The monitor often needs between 35 watts and 80 watts as well. Most desktop computers have a label that lists how much power they need, but this is generally the theoretical maximum and not an average representation.
West Texas Intermediate (WTI) is an extremely high quality crude oil which is greatly valued for the fact that it is of such premium quality, more and better gasoline can be refined from a single barrel than from most other types of oil available on the market.
We use the term 'petroleum products after crude oil is refined in a factory. Crude oil can exist either deep down in the earth's surface or deep below the ocean beds. In oil drilling, a structure called 'derrick' is built with pipes going down to the reservoir and bringing the oil to the surface. Saudi Arabia, USA, Russia, China and Iran are among the top crude oil producers in the world, and the USA is the world's biggest consumer of crude oil, followed by China.