Climate change poses unprecedented challenges to urban environments, necessitating innovative design solutions that integrate sustainability with livability. This research investigates green infrastructure strategies for climate adaptation in three distinct urban contexts: Silicon Valley (temperate), Singapore (tropical), and Jakarta (tropical monsoon). Through comparative analysis of existing implementations and stakeholder interviews, we developed a framework for context-specific green infrastructure deployment. Our findings demonstrate that bio-swales reduce urban flooding by 45-60%, green roofs decrease ambient temperatures by 2-4°C, and urban forests improve air quality by 25-35%. The study provides actionable recommendations for young urban planners and policymakers.