Urban green and blue spaces contribute to climate change adaptation and mitigation and improve physical and mental health and well-being  . Urban green infrastructure including urban gardens, can bring benefits to social cohesion, mental health and well-being and reduce the health impacts of heatwaves by decreasing temperatures, thus reducing inequities in exposure to heat stress for low income, marginalised groups . The trade-offs of increasing urban green and blue spaces include potential public health risks related to increased vectors or hosts for infectious diseases, toxic algal blooms, drowning and aeroallergens .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report