Green-blue adaptation (climate adaptation based on green and water spaces), which uses green and water spaces such as creating urban parks and restoring wetlands, is considered a representative climate adaptation strategy to reduce flood and heat wave damage in cities in the era of climate crisis. However, an international research team has proven for the first time with continent-scale data that such climate adaptation policies can paradoxically stimulate housing price increases and population influx, thereby worsening the housing instability of existing low-income residents.