About a century ago, people used less energy because of the 
The words such as in “such as electronics, automobiles, and home appliances” (paragraph 1) is used to indicate 
The word them in “people often use them to mean the same thing” (paragraph 2) refers to 
The reason why energy conservation is great is that 
This is the use of manufacturing techniques and technology _______ produce things that use less energy for the same result.
What is the best word to complete this sentence? (paragraph 4)
What is interesting about homes built in the U.S. after 2000? 
The word ones in “to make new ones” (paragraph 5) refers to 
“Recycling saves energy __________ less energy is used to recycle than to turn new raw materials into new products.”
What is the best word to complete this sentence? (paragraph 5)
The best word to complete this sentence “_______ the decline in the traditional pub…” (paragraph 6) is 