It’s now clear that approximately 80% of emissions from landscape architecture projects come from materials. This includes the extraction of natural resources, and their manufacturing, transportation, and construction in parks, plazas, streets, campuses, and neighborhoods. A significant portion of emissions in the built environment can be traced back to two materials: concrete and metal, which includes steel and aluminum.
The challenge lies in the fact that we use a large amount of both materials, they are difficult to replace due to their strength and utility, and improving their environmental impact is a complex process. But progress is being made.