Audio Guide：

Earth’s atmosphere not only contains oxygen, which is essential to life, but also maintains the surface temperature on Earth, allowing water to exist in liquid form. The ozone layer blocks out UV radiation, which is harmful to organisms. What’s more, Earth’s magnetic field scatters high-speed charged particles that rush to the Earth and shields off solar wind and cosmic rays. The beautiful Earth provides all kinds of favorable conditions for life to emerge and thrive in a protected environment, allowing for the procreation and evolution of species.