упр.1. Oil reserves.
Ответьте на вопросы:
- What are the most prevalent form of petroleum found in the world?
- What are the estimated reserves of these two sources?
- Is it easy to convert shale oil and tar sands into usable petroleum products?
- What can you tell about the industry to make oil products from tar sands?
- Do Russia produce petroleum products from shale oil and tar sands?
- Is relatively little of the material produced commercially from tar sands?
- Is Venezuela looking at the prospects of developing the vast reserves of heavy oil?
- Will oil products produced from these two raw materials be big enough compared with conventional crude oil?