No country on Earth experiences a green sun as a natural occurrence. The sun is typically seen as yellow or white in color due to the scattering of sunlight by Earth's atmosphere. However, it's worth mentioning that atmospheric phenomena, such as optical illusions or rare atmospheric conditions, can create unusual colorations in the sky. For example, during certain atmospheric conditions like sunrise or sunset, the sun can appear to have a greenish hue briefly, but this is not a regular occurrence and is not specific to any particular country.