Green buildings are designed, constructed, renovated, and operated with resource efficiency in mind. They employ innovative sustainability strategies that focus on non-toxic, durable materials sourced ethically.
Green buildings utilise renewable sources like solar energy and other renewables to reduce fossil fuel consumption and emissions, as well as employ design strategies that lower energy needs, such as daylighting and thermal mass.
Energy Efficiency
Green building techniques can significantly lower a building’s energy consumption and environmental impact. Implementing solar power generation, using sunlight for natural heating and cooling purposes, water-saving plumbing fixtures, eco-friendly materials, waste reduction strategies and making optimal use of existing energy sources are all methods for cutting operational costs while simultaneously decreasing carbon emissions.
Pro: While renewable energy sources, such as solar, may offer great potential benefits, their availability can depend on factors like weather. Wind and geothermal power require proper site location and architecture in order to function.
Early incorporation of green building strategies is crucial for realizing maximum benefits from their implementation. Occupants in green buildings may experience reduced utility and heating costs as well as higher appraised values that make selling property easier in the future; additionally, investments made upfront in sustainable technologies often qualify for tax credits.
Water Efficiency
With fresh water a limited resource and global shortages looming, green buildings prioritize responsible water use. This includes rainwater harvesting and installing waterless urinals, faucets and shower heads which use up to 80% less water than standard ones; as well as using native and drought-tolerant plants that eliminate irrigation needs while decreasing runoff.
Other water efficiency measures include using recycled water instead of potable, installing rainwater collection systems and swales to limit stormwater runoff, using native landscaping or permeable pavement and pavers can reduce consumption by allowing soil absorb stormwater.
Green buildings can produce their own energy through solar panels installed on the roof, offsetting reliance on traditional power sources and decreasing electricity costs for tenants. One office building in Zimbabwe was even inspired by termites’ ability to store and release heat to maintain an ideal climate in their mounds.
Materials
The “Story of Stuff”, or the journey raw materials take from their origin in nature through construction to final disposal in landfill, has significant environmental and social ramifications. Green buildings aim to minimize waste by cutting material consumption while recycling whenever possible.
Eco-friendly building materials like recycled steel and sustainable timber harvested from responsibly managed forests help reduce demand for virgin resources, while their longer lifespan reduces frequent replacement needs and waste production.
Energy efficiency should also be taken into account when selecting building materials and systems. Energy consumption can be decreased through energy-saving windows, lights, insulation measures and heating, ventilating and air conditioning (HVAC) measures with energy-star rated appliances and technologies; water usage can be minimized through low-flow toilets, grey water systems or rainwater harvesting; purchasing renewable energy on-site or green power can further minimize environmental impacts.
Indoor Air Quality
Green building standards and certifications emphasize healthy indoor air quality for optimal building performance. Air quality monitoring is an integral component of this effort, enabling builders to quickly identify issues with filtration systems so that long-term damage and costly repairs can be prevented.
Air contaminants in a building may come from many different sources, including smoking, cleaning products, mold spores and chemical spills. Prolonged exposure to such contaminants can lead to respiratory illness, cardiovascular issues and cognitive dysfunctions in people exposed.
Green construction practices aim to ensure a building is healthy and safe for its occupants by employing low-VOC emitting paints, building materials, and interior components that reduce indoor air quality in some ways. Although experimental evidence supports these strategies improving indoor air quality in some ways, their effects remain unclear after it has been operational for an extended period of time.