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Scaling up 10 existing climate solutions in Estonia, Latvia, Lithuania, Poland, and Ukraine could reduce 2030 emissions by approximately 149 Mt (CO2e), representing a 13% reduction compared to baseline projections. The most significant absolute reductions are possible in Poland (71 Mt) and Ukraine (64 Mt), while the highest relative impacts are in the Baltic States, potentially cutting emissions by nearly 40% in Estonia and over 30% in Latvia and Lithuania. Energy efficiency in buildings and industry offers the highest potential and is the most cost-effective, with building efficiency alone potentially saving 2.9 billion euros by 2030. Conversely, wind power provides the greatest relative potential in the Baltic States. The report identifies common barriers such as high investment costs, weak carbon pricing, and lack of financing, and recommends policies including the phase-out of fossil fuel subsidies, stable legal frameworks, and targeted financial incentives.