Lesson XXVI: Vocabulary in Context

John: The times when the prize of commodities were based on the principle of demand and supply belong to the history of economic science. Today, politics is involved everywhere, including economy, shaping trade proposals and economic environment. Ali: Could the deposits of crude oil in the world be exhausted some day? John: Certainly. It’s going to happen before the turn of the century. Then, oil from other sources might come into play. It would be even more expensive than crude oil with a great negative impact on the environment during exploitation. Ali: What about coal and gas? John: In spite of the negative impact on the environment almost 30% of total electricity production in the USA is covered by burning coal and 32% by burning natural gas. Exercise: 2.4.1. Practice RESOURCE, etc. Answer the following questions. 1. What is one of the keys to the richness of the USA? 2. What is the main energy source of human civilization? 3. What are some forms of hydrocarbons? 4. Does the United States contain large quantities of all hydrocarbon forms? 5. Does the economy of the world rely upon economic science or politics? 6. What do you think, “Are the resources of hydrocarbons infinite?” 7. What is the percentage of electric power produced by utilizing coal and gas?