Wood framing is a more efficient barrier against changes in outdoor temperature and requires less energy to cool or heat the indoor space. According to the Western Red Cedar Lumber Association, wood is also simpler to apply insulation to in order to increase its thermal resistance.
Wood frames reduce the demand for energy to heat and cool the indoor spaces they create. Since greenhouse gases are byproducts of most methods of energy production, this type of frame contributes to less air pollution and damage to the ozone layer.
Since wood framing requires less use of heating and cooling systems, this adds up to energy savings with reduced utility bills than if you had to control the temperature in an environment surrounded by a stone or steel frame.
Wood is a renewable resource that is inexpensive to propagate. Planting trees is also a clean process unless toxic herbicides are used. Moreover, wood is biodegradable. Parts of trees not used in frame construction decompose, adding organic matter to the soil that nourishes plants and supports beneficial soil-borne microorganisms.