 Hello. In this lesson, we will go over the market drivers for petroleum refining industry, an overview of refinery processes and refinery products, and the chemical constitution of Kuro. Obviously, the principal driver for petroleum refining industry economics that is now very closely tied to environmental regulations as well. So we need to look into the supply and demand picture, whether it is for the crude oil or the refined products, such as fuels, gasoline, diesel, jet fuel, etc. and the environmental regulations and the composition of these fuels, as well as on the operation of the refinery and the flexibility of the refinery to respond to the demand shifts or supply shifts on either side of this operation. And we will go over finally the chemical constitution of this very complex feedstock crude oil and how we can, in essence, better understand how different each crude oil is and how a refiner can do to adjust the processes, to accommodate these differences in the crude oil supply. A recent development in the United States, the increased production of soil gas, which also produces some liquid byproducts that are entering the refinery as our tourism feedstock. So we need to really understand how these feeds could be refined to give us a conventional set of products that we produce in the refinery. So I look forward to seeing you in these lessons and go through the activities. Thank you.