The environmental role of the outer envelope of the sustainable building and its reflection on the internal spaces

A clean and safe environment has become one of the challenges that the world is facing today, as a result of various human activities such as industry, agriculture and housing projects that have contributed to great damage to the environment and air pollution. People have become aware of environmental pollution and are moving towards new environmentally friendly technology and materials that help preserve the environment for future generations. . Hence, energy-saving buildings or sustainable buildings can reduce energy demand, so achieving sustainability in the field of interior design requires a great and multifaceted effort to address environmental, social and economic problems, and sustainability as a concept means the continuity of interaction between society, the environmental system and the outer envelope of the building It plays a major role in preserving the internal environment through the use of environmentally friendly building materials. Smart building materials are distinguished from traditional building materials in that they are more diverse in their shapes, characteristics, and uses in the building. We can define smart materials as materials that are able to respond to environmental changes surrounding them, by changing their properties or composition in the way they are already known, causing an instantaneous change. When used in the building envelope, they can respond intelligently to the climatic changes surrounding the envelope from summer to winter or from Hot to cold environment to reach the comfort of users. As a use (pollution-reducing cement - low-emissivity glass windows - ....).