Green Infrastructure
- Infrastructure based on natural systems and nature-based solutions
- Provides environmental, social and economic benefits along with development
- Treats nature as part of the solution, not an obstacle
- Helps in carbon sequestration and air purification
- Reduces urban heat island effect and regulates temperature
- Supports flood control and groundwater recharge
- Enhances biodiversity and ecosystem services
- Cost-effective and sustainable in the long term
- Improves climate resilience of cities and infrastructure
Grey Infrastructure
- Infrastructure built using concrete, steel and engineered structures
- Designed mainly for single, specific functions
- Environmental concerns are secondary or limited
- Associated with high carbon footprint and pollution
- Often increases heat stress and environmental pressure
- Focuses on rapid water drainage, sometimes increasing flood risk
- Causes loss of biodiversity and natural habitats
- Requires high maintenance and long-term costs
- More vulnerable to climate change impacts
Key Differences
- Green Infrastructure is nature-based, while Grey Infrastructure is concrete-based
- Green provides multiple co-benefits, Grey serves single purposes
- Green enhances climate resilience, Grey often increases climate vulnerability
- Green supports sustainable development, Grey represents traditional development