упр.1. Coal.
Ответьте на вопросы:
- What do most electric companies burn to produce steam?
- Can we tell that coal is a general term for a wide variety of solid materials that are high in carbon content?
- Is coal also used in factories to provide heat for buildings and industrial processes?
- Is special, high-quality coal turned into metallurgical coke?
- In what industry metallergical coke is used?
- What can you tell about the world’s coal reserves?
- How many times the amount of coal reserves that is technically and economically recoverable is larger than that of crude oil?
- How many regions contain three-fourths of the world’s coal reserves that are now technically and economically recoverable?
- Can you name this regions with indication of percentage share of each?
- What are the world’s reserves of coal in figures on the territory of the former Soviet Union?