Green buildings are designed with various environmental considerations in mind, such as energy consumption and emissions, indoor environmental quality, material selection and site impacts.
Green buildings can also contribute to their surrounding community by reducing pollution and strain on natural resources, with special consideration paid to sustainable water management practices.
Energy Efficiency
Green buildings are intended to minimise energy usage and emissions while utilising renewable sources for power production. Furthermore, they address indoor environmental quality which may result in greater productivity and health among their occupants.
Buildings account for an enormous share of global greenhouse gas emissions and energy, water, and material consumption; increasing their efficiency can reduce these impacts significantly.
Energy efficient measures in green buildings often include solar panels to provide electricity onsite, phase change materials that store and release thermal energy, Trombe walls that absorb sunlight for heating and cooling, as well as strategically orienting structures so as to make use of natural sunlight as another energy-saving strategy.
Water efficiency is another distinguishing feature of green buildings. They utilize low-flow fixtures to lower water consumption while still meeting performance goals, and often rely on nonpotable sources like rainwater collection systems or nonpotable groundwater sources as rainwater storage tanks to reduce stress on local supplies and sewerage systems.
Indoor Air Quality
While governments and green building certification programs worldwide emphasize energy-savings strategies, some also place an emphasis on healthy indoor environmental quality (IEQ). IEQ refers to factors that affect occupant health, comfort and productivity within an indoor space.
Green buildings typically include ventilation systems that effectively circulate outdoor air while simultaneously exhausting any stale indoor air, helping to lower pollutant concentrations and keep pollutant concentrations under control.
Green buildings employ natural flooring and furniture that release less chemicals into the environment than their conventional alternatives, including natural cork flooring that releases zero VOCs into the air, as well as materials which regulate humidity levels to prevent mold or mildew growth.
Materials
Green building materials market is rapidly expanding, thanks to eco-conscious homeowners and stricter building codes aimed at energy efficiency. Smart green materials like thermochromic and photovoltaic windows increase sustainability while simultaneously decreasing energy bills and cutting expenses.
Other sustainable construction techniques include using solar panels to generate clean energy and natural lighting to lower electric consumption. Mycelium (an underground network of fungal strands) also plays an integral role in green building practices.
Green buildings that reduce carbon emissions provide healthier environments for occupants while meeting environmental, social, and governance (ESG) standards. Additional sustainability features of such green buildings include using recycled materials, prioritizing ventilation systems, and restricting volatile organic compound usage.
Water Efficiency
Green buildings promote water efficiency as one-quarter of global freshwater resources become scarcer. They utilize low-flow plumbing fixtures and construction techniques that decrease consumption such as xeriscaping or rainwater harvesting to conserve this vital resource.
Bullitt Center uses an innovative system of rainwater collection and greywater recycling to supply all the water required for washing and irrigation – saving 165,000 gallons annually while helping alleviate pressure on municipal water supplies and sewerage systems.
Green buildings strive to reduce waste through the use of recycled materials and construction methods that limit landfill disposal. Furthermore, green buildings encourage sustainable landscaping with native and drought-tolerant plants which decrease irrigation needs while using infiltration tanks to control wastewater runoff and soil erosion.
Life Cycle
Buildings have an enormous environmental impact both during their use and at their end-of-life. Green buildings aim to reduce this impact by considering numerous aspects, from extracting raw materials through to their operation and eventual deconstruction or recycling.
These efforts include efforts to decrease energy use during both construction and occupancy of green buildings. Green buildings also reduce material waste at their end of useful lives by making repairs easier, and reuse options more available.
Green features can reduce the risk of natural disasters through measures such as building siting and passive survivability techniques, while others take into account how buildings affect occupants, including through education and encouragement programs that save energy and resources.