The idea derived from Buddhist teaching on deep ecology, on interconnectedness of all beings.
When we take a step on the green earth, we are aware that we are made of air, sunshine, minerals, and water, that we are a child of earth and sky, linked to all other beings, both animate and inanimate.
Our survival depends on the survival of our Mother Earth, with all her children; the plants, the minerals, the animals, the sun, the moon, and all species. So to protect her is to protect ourselves, our children, their children and all species on Earth.
It's a miracle to lie on the grasses of spring, watch the splendid landscape our Mother Earth paints... and all other seasons.