Even if all factories, airplanes, and cars were to stop emitting carbon dioxide overnight, global temperatures would still continue to rise for several more decades. This is due to the thermal inertia of the oceans, which have absorbed more than 90% of the excess heat from human activities since the 1970s. The oceans act like a massive thermal battery, storing heat and slowly releasing it back into the atmosphere over time. This process is known as the Zero Emissions Commitment (ZEC), which suggests that global warming would persist for one to two decades after emissions stop before eventually stabilizing. Each additional degree of warming caused by this stored heat could lead to a sea level rise of about 2.3 meters over the course of two thousand years. This is due to both the thermal expansion of water as it warms and the melting of ice sheets and glaciers. The energy absorbed by the oceans doesn't simply vanish; it remains trapped in the water and is gradually released into the atmosphere. This delayed release explains why global temperatures will continue to rise even after all emissions have ceased. Ocean currents play a crucial role in moving heat between different parts of the ocean and across latitudes, which complicates the way heat returns to the atmosphere. Sometimes, heat resurges thousands of kilometers from where it was originally absorbed, leading to unexpected marine heatwaves in regions where local emissions have decreased or stabilized. This redistribution of heat highlights the complexity of the Earth's climate system and the far-reaching effects of global warming. The concept of ocean thermal inertia has been recognized by scientists since at least 2008, and subsequent climate reports have confirmed this understanding each year. The delay in temperature stabilization is due to the physical property of thermal inertia, where water takes a long time to warm up and even longer to cool down. The top few meters of the ocean, which are most directly influenced by the atmosphere, continue to release stored energy long after emissions have stopped. The consequences of this stored heat extend beyond rising temperatures, with sea levels continuing to rise for centuries, even after all emissions have ceased. Some scientists describe this as a "climate debt" that future generations will have to deal with, despite current efforts to reduce emissions. This delay in the climate system's response underscores the urgency of reducing emissions now. Every ton of carbon dioxide avoided today reduces the thermal burden that future generations will inherit. The ocean's ability to store heat and gradually release it over time highlights the complexity of the Earth's climate system and the long-term consequences of past emissions.