Please answer the following question: Read the article and select the best answer. Article: These days a green building means more than just the color of the paint. Green building can also refer to environmentally friendly houses, factories, and offices. Green building means "reducing the impact of _ on the land"Taryn Holowka of the U.S Green Building Council in Washington, D. C. said. According to Holowka, buildings account for 65 percent of total U.S. electricity use. But green buildings can reduce energy and water use. Also, the buildings are often located near public transportation such as buses and subways, so that people can drive their cars less. That could be good for the environment, because cars use lots of gas and give off pollution. Green buildings are often built on developed land, so that the buildings don't destroy forests. Marty Dettling is the project manager for a building that put these ideas into action. The Solaire has been called the country's first green high-rise building. According to Dettling, "We've reduced our energy use by one-third and our water by 50 percent." The Solaire cuts energy in part by using solar power. "On the lace of the building we have solar panels which change the sun's energy into electricity," Dettling explained. The Solaire also has lights that automatically turn off when people leave the room. In addition, the building has lots of windows, allowing people to use the sun for light during the day. The Solaire cuts water by reusing it. Not everyone is eager to move into a green building, however. Some people think that things like solar panels cost more money than more traditional energy sources. Anyhow, Holowka said, "It's going to be big." Question: What is the main subject discussed in the text? Options: A: Dettling designed the first green building in the U. S. B: Energy shortage calls for buildings of new design. C: Green buildings help save environment. D: The Solaire serves as a model of high buildings.
Answer:
C