Tim Morton's excellent essay in Collapse VI, marks out the ‘ecological thought’ as an investigation into the impacts of ecological interdependence on philosophy and theory, into the emergence of a thinking that is itself ecological. He frames it as a humiliation,

From Copernicus through Marx, Darwin, and Freud, we learned we are decentered beings, inhabiting a Universe of processes that happen whether we are aware of them or not, whether we name those processes 'astrophysics', 'economic relations', the 'unconscious', or 'evolution'. The correct but surprising conclusion to draw from ecological humiliation, however is not some form of nominalism or nihilism, but a politicised intimacy with other beings.

Out of an axiomatised interdependence theorem arise a number of concepts: hyperobjects (objects massively distributed in space and time, such as Climate or Styrene), strange strangers (our encounters with other beings are strangely strange), the mesh (entangled strangers) , dark ecology (“dark ecology is melancholic; melancholy is the Earth humour, and the residuum of our unbreakable psychic link with all life forms”).

All of this, of course, entails a radical debasing of Nature as essential substance; “the featureless remainder”, “an empty category looking for something to fill it”. [1]

I particularly like this,

Heidegger's environmentalism is a sad, fascist, stunted bonsai version, forced to grow in a tiny iron flowerpot by a cottage in the German Black Forest.

My notes on The Ecological Thought are here.