| Earth-Sun relationship The Earth depends on the sun for its existence as a planet hospitable to life, and solar energy is the major factor determining the climate. Hence, conditions on the sun and conditions on Earth are inextricably linked. Although the sun's rays may appear unchanging, its radiation does vary. Many scientists suspect that sunspot activity has a greater influence on climatic change than variations attributed to the greenhouse effect | 地日关系 (地球依靠太阳而成为一个适宜生命生存的行星，且太阳能是决定气候的主要因素。 因此，太阳上的条件和地球上的条件有着密不可分的关系。虽然太阳光看似无变化，但它的辐射却改变了。 许多科学家怀疑，太阳黑子的活动对气候的影响远超过温室效应所带来的变化。) |
