Economy and ecology are very close together. Economics uses energy to transform nature. You can have a look at the book Economy for Children for a better approach. Nature itself is based on energy and waves as we have just seen.

Eco from economy and ecology means home. Mankind manages his own house in the nature’s house. Ecology inspires other sciences. Economy allows to establish human strategy within ecology. But shouldn’t we observe and philosophize around ecology in order to discover new scientific principles?

The biologist HAECKEL defined ecology in 1866: "The organisms’ relations’ science with the surrounding world, that is, in a broad sense, the science that allows to exist."
An ecosystem constantly recycles every of its elements. It is the same in economics, but not with a unprotected economy, in other words liberal, because recycling is expensive for humans.

Life allows to recycle in nature. The whole lithosphere, hydrosphere, atmosphere, biosphere is the ecosphere.