Being able to buy, sell, and deliver energy across borders—whether through natural gas shipments or electric transmission lines—can make energy systems more cost-effective, secure, and resilient. Integrating power grids, in both infrastructure and regulatory frameworks, allows electricity to move between countries efficiently to meet fluctuating supply and demand. A more interconnected region could expand the reach of renewable energy sources and complement the power supply in countries with different climates, seasonal conditions, or time zones, according to a 2017 study by the Inter-American Development Bank (IDB).