Energy will be one of the defining issues of this century. One thing is clear: the era of (1) oil is over. What we all do next will determine how well we meet the energy needs of the entire world in this century and (2) .
Demand is soaring like (3) before. As populations grow and economies (4) , millions in the developing world are enjoying the benefits of a lifestyle that (5) increasing amounts of energy. In fact, some say that in 20 years the world will (6) 40% more oil than it does today. At the same time, many of the world’s oil and gas fields are (7) . And new energy discoveries are mainly occurring in places where resources are difficult to (8) , physically, economically and even politically. When growing demand meets (9) supplies, the result is more (10) for the same resources.
We can wait until a crisis forces us to do something. (11) we can (12) to working together,
A. novel
B. toxic
C. numerous
D. tough
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