What do water, sun, mountains and ten ring in China's environmental signs represent respectively? What is the meaning of the whole shape?

The figure consists of green hills, green waters, the sun and ten rings around it. The central structure of the figure represents the environment on which human beings depend, and the ten outer rings are closely combined and connected, indicating public participation and environmental protection; At the same time, ten ring's word "ring" is the same as the word "ring" in the environment, which means "the whole people are connected and * * * protects the environment on which human beings depend."