The pressure difference between the equator and the poles is primarily caused by the unequal heating of the Earth's surface. The equator receives more direct sunlight and heat compared to the poles, resulting in warmer air and lower pressure at the equator. In contrast, the poles receive less sunlight and heat, leading to colder air and higher pressure at the poles. This temperature difference creates a pressure gradient, causing air to move from high pressure areas (poles) to low pressure areas (equator), resulting in the establishment of global wind patterns.
