Urban infrastructure must be designed, constructed, operated, and decommissioned in such a way as to ensure its economic, financial, social (including climate resilience) and environmental sustainability. This requires new approaches and methods which place priority on human and environmental dimensions of sustainability when making decisions.
Porous natural landscapes such as forests, wetlands, and grassy areas naturally absorb stormwater and slowly release it back into groundwater or nearby bodies of water, while hard surfaces like streets, parking lots, or rooftops essentially repel it leading to runoff.
1. Reducing Greenhouse Gas Emissions
Sustainable urban infrastructure fosters the gradual switch away from fossil fuels to renewable sources of energy, helping reduce greenhouse gas emissions and climate change impacts.
Green urban infrastructure is a broad field that spans numerous aspects of sustainable development. Some examples include increasing social equity, addressing environmental problems, and mitigating urbanization’s adverse effects.
Nature-based infrastructure, which uses natural ecosystems like parks, urban forests and street trees to provide infrastructure services such as water filtration, temperature regulation and flood control is another area of focus. This approach can help cities reduce air pollution, greenhouse gas emissions while supporting biodiversity while raising property values – often at less expense than traditional solutions.
2. Reducing Water Pollution
Over 90% of urban areas worldwide are in close proximity to water sources, leaving them susceptible to natural threats like flooding and droughts. Sustainable infrastructure seeks to mitigate such hazards using equipment and systems which are environmental-friendly from start to finish.
Cities can employ green infrastructure to mitigate flood risks by turning cement and tarmac surfaces into absorbent spaces such as parks or rain gardens, conserving rainfall while simultaneously decreasing municipal water supplies while providing environmental benefits like stormwater runoff treatment and groundwater recharge.
Urban infrastructure that incorporates nature has also proven its effectiveness at meeting goals 1, 3, 6, 9 11 and 13 of the Sustainable Development Goals. Nature based solutions have also proved cost-effective and climate resilient solutions.
3. Reducing Energy Consumption
Cities are economic powerhouses for their nations, yet they consume an excessive share of global energy resources and contribute significantly to greenhouse gas emissions. By decoupling urban development from resource consumption, sustainable city infrastructures can support economic expansion without harming the environment.
Cities can reduce energy usage by switching to electric vehicles and investing in renewable energies like solar. Copenhagen, for example, boasts more bicycles than cars; their city has even installed cycle superhighways that encourage people to commute by foot or bike instead of car.
Cities’ green infrastructure – from parks and horticultural gardens to urban parks and botanical gardens – can play an integral part in mitigating climate change by offering flood protection and water filtration infrastructure services, collectively known as “nature-based infrastructure” (NBI) or ecosystem services.
4. Reducing Noise Pollution
Traffic noise, trains, airplanes and other sources of pollution can be significantly reduced with sustainable urban infrastructure solutions such as green walls or rooftop gardens that use sustainable techniques to absorb and deflect soundwaves emitted by traffic or aircrafts. These natural solutions also offer recreational spaces to city residents while supporting biodiversity and improving air quality.
Reducing environmental impact through infrastructure planning is essential to creating sustainable cities, which is why the Sustainable Urban Infrastructure Guidelines offer a framework for setting environmental performance goals and incorporating them into infrastructure projects across all sectors. They ensure that new or existing infrastructure remains environmentally responsible from design through operation and maintenance.
5. Reducing Waste
cities can benefit greatly from creating sustainable urban infrastructures, which help cities reduce waste in various ways. One such way is through smart energy systems which optimize energy use and limit emissions; other measures may include optimizing transport routes with real-time data to help decrease idling time and fuel consumption.
Implementing green infrastructure – such as parks, green roofs and urban forests – is one way to reduce waste. These natural elements help lower air pollution levels, create cooler cities and promote biodiversity while offering recreational opportunities and increasing property values.
Other sustainability initiatives include water conservation programs that reduce drinking water needs. This may involve cutting back on building water usage as well as installing rain gardens and permeable pavement in city streets to lower consumption.