Because fuel cells remain somewhat more expensive than traditional power sources, many governments provide a subsidy, grant, or other types of aid to encourage the use of fuel-cell systems. As assistance expands, it is expected that more companies and power users will see the intrinsic advantages of fuel cell use. As demand rises, fuel-cell equipment costs should fall. In the years ahead, it is expected that the use of fuel cells will become more common as costs decline and the world continues to address pollution problems. Experts even predict that it might not be long before tiny fuel cells will be used to power cell phones and much larger units will become an essential element at every big power plant.
Based on the text structure used, what is the main idea of this passage? Use examples from the text to support your response. RACES sentence starters: The author is using the________text structure to share the main ieea that___________________________For example, the author states, "________________," This quote shoes that _______________. Therefore, the author's author's use of the___________ text structure shows that ____________________.​