Ecopsychology offers three insights:

  1. There is a deeply bonded and reciprocal relationship between humans and nature. Ecopsychology draws on two metaphors for this relationship: (a) nature as home and family (e.g., Earth as mother, animals as siblings) and (b) nature as Self, in which self-identifications are broadened to include the "greater-than-human" world and Gaia.
  2. The illusion of a separation of humans and nature leads to suffering both for the environment (as ecological devastation) and for humans (as grief, despair, and alienation).
  3. Realizing the connection between humans and nature is healing for both. This reconnection includes the healing potential of contact with nature, work on grief and despair about environmental destruction, ecotherapy, and psychoemotional bonding with the world as a source of environmental action and sustainable lifestyles.  (More)

Solastalgia 

Solastalgia, simply put, is “the homesickness you have when you are still at home”.
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The Ecological Self 
By John Seed

Deep Ecology is a philosophy of nature which sees the environmental crisis as a symptom of a psychological or spiritual ailment which afflicts modern humanity. We are enveloped by the illusion of separation from nature, by anthropocentrism or human centeredness. Deep ecology critiques the idea that we are the crown of creation, the measure of all being: that the world is a pyramid with humanity rightly on top, merely a resource, and that nature has instrumental value only.
What is EcoPsychology?
By Robert Greenway

Radical Ecopsychology: Psychology in the Service of Life (A Review)
By Andy Fisher 

Ecopsychology: Eight Principles 
By Theodore Roszak

The Transpersonal Dimensions of Ecopsychology: 
Nature, Nonduality, and Spiritual Practice
By John Davis, Ph.D.

Ecopsychology, Transpersonal Psychology, and Nonduality
By John V. Davis       

The Voice of the Earth: An Exploration of Ecopsychology (Book)
By Theodore Roszak

Michael Cohen: The Ecopsychology Interview
By Project NatureConnect

Ecopsychology and the Ecological Unconscious 
By Theodore Roszak