A new study has found that as cities expand and urban green spaces increase to mitigate the effects of climate change, they also become breeding grounds for diseases spread by mosquitoes and other insects. This is because warmer temperatures and changing weather patterns allow these disease-carrying pests to thrive in urban areas. The researchers warn that balancing the benefits of green spaces with the risk of disease transmission will be crucial in maintaining public health as the world adapts to a changing climate, requiring careful decision-making about how to design and manage urban green spaces.