If you have COVID-19, you could__36__ it to others, even if you do not have symptoms. When you have symptoms, get tested and stay home until you have your__37__. If you have tested__38__(even without symptoms), follow the __39__ recommendations by the Centers for Disease Control and Prevention. You would need to stay home and away from others for at least 5 days (possibly more, depending on how the virus affects you) and wearing a highquality,__40__mask when indoors around others for a period of time.

        “Green building” is a popular term these days. But what does that really mean, and who decides whether a building is green or not? In the United States, there is no governing body which says: “This building is green and that one isnʼt.” The Environmental Protection Agency does have a definition in place, though. According to the EPA, green buildings are structures that use natural resources efficiently and in a sustainable way.

       You might think that this is a new or very modern idea, but it actually dates back half a century. In the 1970s, buildings that used the modern “green” architecture concepts began to appear. For instance, the Willis Faber and Dumas Headquarters building in England had a grass roof. It also had a large center hall that was lit by natural light. In California, the Gregory Bateson Building was one of the first constructions to use solar cells to store energy from the sun.

       In the following decade, people were starting to realize that besides helping the environment, green buildings could also save them money on their heating, cooling, and electric bills. Solar panels became more widely used for a renewable source of electricity. Buildings also began to be equipped with rainwater collection systems. In another decade’s time, even the White House itself was undergoing the process of turning green. Experts believe that, since 1996, the White House has saved US$300,000 a year in energy and water costs.

       Today, green architecture is taking off all over the world. There is even a Global Award for Sustainable Architecture, which was founded in 2006. It is handed out each year to five architects who design the most revolutionary and innovative green buildings. One of the winners in 2023, Xu Tiantian of China, is known for her “Architectural Acupuncture,” a holistic approach to the social and economic revitalization of rural China. In the future, more architects are expected to join this green trend.