People often use the word green to describe things that are good for nature and the environment. When people stop doing something that pollutes the environment, they say they’re “going green.” Other terms to describe things that are good for the environment are Earth friendly, eco-friendly, and environmentally friendly.

Technology is another word for tools. People use certain tools, such as bulldozers and cranes, to construct buildings. They use other tools, such as heating, air-conditioning, electrical, and water systems, to keep buildings running. The term building technology refers to all the machines and techniques people use to construct and operate buildings.

Some building technology can hurt the environment. Most buildings create pollution by using up a lot of energy and resources. The goal of green building technology is to make buildings and even whole communities that save energy and resources and that work in harmony with the environment.

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