Economic policy instruments play a central role in reducing greenhouse gas emissions, as they aim to internalize the social and environmental costs of climate change into economic decision-making. The guiding principle behind these instruments is to align market behavior with environmental sustainability by creating incentives for mitigation and adaptation. Since greenhouse gases are global pollutants, individual actions or national policies must be carefully structured to encourage reductions at the lowest possible cost while stimulating innovation and sustainable growth. Economic policy instruments can be broadly categorized into market-based mechanisms, regulatory tools with economic incentives, and supportive measures that influence investment and consumption patterns. One of the most widely discussed instruments is carbon pricing, which includes carbon taxes and cap-and-trade systems. A carbon tax imposes a direct fee on the carbon content of fossil fuels, thereby sending a price signal to producers and consumers that encourages them to shift towards cleaner alternatives. For example, higher carbon prices make renewable energy sources, energy efficiency technologies, and low-carbon innovations more competitive compared to fossil fuel-based energy. From a mitigation perspective, carbon taxes directly reduce emissions by discouraging the use of high-emission fuels. From an adaptation perspective, the revenues generated from carbon taxes can be directed towards resilience-building projects such as flood protection, disaster preparedness, or sustainable agricultural practices. However, the effectiveness of carbon taxes depends on the rate set and the coverage across sectors, as low tax levels may not sufficiently alter behavior, while overly high taxes could burden low-income households unless revenues are recycled for social equity measures. Cap-and-trade systems, or emissions trading schemes, function by setting an overall emissions cap and distributing or auctioning permits that allow firms to emit a certain amount of greenhouse gases. Companies that reduce emissions more cheaply can sell excess permits to firms facing higher abatement costs, leading to cost-effective reductions across the economy. This market-based flexibility promotes efficiency and innovation, as firms are incentivized to find the least-cost options for reducing emissions. Well-designed trading schemes can link across borders, such as the European Union Emissions Trading System, enhancing global cooperation. However, the success of these systems depends on robust monitoring, reporting, and verification mechanisms to prevent manipulation and ensure credibility. In adaptation terms, revenues from permit auctions can be directed towards communities most vulnerable to climate impacts, thereby aligning mitigation with broader resilience goals. Another instrument is subsidy reform, particularly the phasing out of fossil fuel subsidies. Many countries subsidize coal, oil, and natural gas to keep energy prices low, but such subsidies encourage overconsumption of carbon-intensive fuels and lock in high-emission infrastructures. Reforming these subsidies helps level the playing field for renewable energy and energy-efficient technologies, while simultaneously reducing fiscal burdens on governments. Redirecting these subsidies towards clean energy research, public transportation, and climate adaptation projects not only reduces emissions but also supports long-term sustainable development. However, subsidy reform must be carefully managed to avoid adverse impacts on vulnerable populations, requiring complementary policies such as targeted cash transfers or energy access programs. In addition to removing harmful