<In the first part of the article, we learned about the so-called Green buildings that adopt the principle of a clean environment as a way of living and a principle that does not deviate from it by using materials from nature and energy sources that do not pollute the environment to preserve human life and health, the wheel of time does not stop and the future is inevitably coming, and experts must search for everything that provides comfort and safety and end or reduce pollutants caused by the industrial revolution and technological development in spoiling the environment, so the prevailing trend in most countries, investors and citizens is to move towards green (sustainable) buildings.

<The basic component of green buildings is the awareness of the citizen who is used to a lifestyle that depends on traditional energy and the use of electrical appliances and gas stoves and the harmful emissions they cause to the environment and the health of citizens, because nothing is perfect in the world, so these buildings have some disadvantages, including the need for places with bright sun to generate energy and they work to generate energy that leads to high temperature; therefore, they are not designed for hot areas They are not designed for hot areas because they do not have air cooling systems, which was noticed by engineer Hassan Fathy - the best architect in the world - and was able to design an entire city in southern Egypt in the form of domes, which contributed to reducing the temperature of the house by fifteen degrees by using natural ventilation methods by drawing air inside the house and passing it through the high domes to occur the decrease and end the need for air conditioners that have nothing to do with green buildings.

Some examples of green buildings in the world:

Millennium Dome: One of Britain's most famous landmarks, an architectural structure resembling a tent.

- South Federal Center in Seattle, WA: Provides light and fresh air.

- The Green Shelter in Stuttgart, Germany: Powered by solar cells.

<To summarize, the world has realized that the overuse of conventional energy is dangerous and causes serious damage to the environment and the health of citizens, and that a return to nature is inevitable, and it is time to focus on building society rather than buildings.

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