Deep ecology is the study of the natural world around us.
It includes both natural and human-caused processes such as pollution, resource extraction, deforestation and pollution from mining and waste.
The term also covers the study and use of ecosystems and their natural resources such as the oceans and air.
For some people it can mean the study or use of human-made products.
Deep ecology encompasses a range of fields including ecology, geophysics, biodiversity, earth systems, environmental sustainability, and ecology of knowledge.