1. Utilization of renewable resources Recycled steel: Use recycled steel for construction to reduce resource consumption and waste generation. For example, in some large-scale construction projects, recycled steel is used as the main structural material.

2. Lightweight design Reducing material consumption: The high strength of steel structures combined with lightweight design can reduce the use of materials while meeting strength requirements, reduce the total weight of the building, and reduce the energy consumption of the foundation and supporting structure.

3. Energy-efficient buildings Energy-saving design: Many steel structure buildings adopt efficient insulation and energy-saving designs, such as optimization of the outer envelope structure to reduce energy loss. For example, some commercial buildings use steel structure frames to achieve natural ventilation, thereby reducing air conditioning energy consumption.

4. Green building LEED certification: Many steel structure projects use sustainable materials and energy-saving technologies to obtain green building certification (such as LEED). For example, some large commercial centers and public buildings have improved the environmental performance of buildings by using steel structures and green roof technology.

These demonstrate the multiple advantages of steel structures in environmental protection, which not only improves the sustainability of buildings but also promotes the development of the green economy.