Nature is typically cast as a mother. As such can be seen along the lines of the feminist charicature of the stages in the life of a woman. As a virgin, we see a pristine ecosystem, a bounty waiting to be exploited. As a mother, Nature’s provision is bountiful and sufficient, and her authority beyond question. As a whore, nature’s resources are exploited and spoiled. As a crone, the exploitation has gone on long enough that she has dried up: withered, wrinkled and infertile, Nature’s bounty is no longer enough. There are two trajectories after that – one is death; the other, resurrection: ‘Nature’ is rebuilt to serve human needs.

Many years ago, I listened to a talk given by Dr. Keith Farnsworth, an ecologist now based at Queen’s University Belfast. It has stuck in my mind. He did not use language such as the above, but the parallels in his theorization of stages of human-environment interaction are striking. The first stage he described as ecosystem occupation — humans move in to an ecosystem. The second stage is ecosystem adaptation, in which humans make alterations to the ecosystem so it better meets their needs. The third and final stage Dr. Farnsworth outlined is ecosystem domination: humans completely control the ecosystem so it meets only their needs.

His theorized trajectory, which I cannot find written up among his extensive list of publications, could be refined with a fourth stage: ecosystem elimination. Ecosystem elimination occurs in two ways: destruction and substitution. The cause of the former case is simply that the control the humans have exerted over an ecosystem in the domination stage is temporary because we have not fully understood the processes by which the resources we rely on are renewed and regenerated. The domination is unsustainable and after a period of time, the ecosystem collapses. There are plenty of examples of this in the history of agriculture, especially where agricultural practices that have evolved in one biome have been transferred to another. That’s beside the point that domination of any kind seems rarely to be sustainable indefinitely. Worms turn.

Ecosystem elimination by substitution is still in the realms of science fiction; but it happens when we no longer need ecosystems to sustain human life. In Star Trek, ecosystems have disappeared into a machine, the replicator, that creates food presumably from waste, by decomposing the latter into its constituent atoms and reconstructing it as a meal. This is the ultimate junk food; quite literally, eating shit! (This is not entirely fantasy I suppose, since faecal coliforms have been found in hamburgers.) Recognising the amenity value provided by ecosystems, a holographic projection suite with haptic enhancements, the holodeck, is provided for the crew of the Starship to enjoy some recreation. These simulated spaces presumably have none of the inconveniences of real ecosystems (unless requested by the user): no biting insects or ticks; no poison ivy; no allergens or pathogens; never too hot or too cold. Instead, simulated wind in simulated trees on a simulated balmy evening; breathing simulated fresh air while listening to simulated birds singing simulated songs as they go to a simulated roost. All available at the push of a button, whenever the mood takes you, without having to wait for the sun to set. This is Eden made real, or as real as needed to pass the environmental equivalent of the Turing Test.

Are contemporary cities much different from space ships in science fiction? Instead of replicators, we have supermarkets. Supermarkets are increasingly moving away from selling fresh ‘raw’ ingredients to providing ready-meals. These have more ‘value-added’ than raw ingredients, and hence better profit margins. One could almost pretend the microwave oven was a replicator. Of course, supermarkets obtain their produce from farms, arguably dominated ecosystems, but for how much longer? Architects have already designed skyscrapers where each floor is given over to hydroponic systems for growing food. Hydroponics are indeed already widely used for growing fruit and vegetables under glass, allowing their availability on the shelves even when not in season.

If supermarkets are replicators, then parks (or ‘green spaces’) are holodecks. These spaces, which are too small and too disconnected to support much in the way of wildlife, often consist of an expanse of lawn with a few trees growing in them. Sometimes there are shrubs and flowerbeds, and a pond, lake, river or stream. Paths will be provided so we can walk and enjoy the amenity without getting our shoes muddy. The countryside is not really needed. This matter was brought into sharp focus for me when I left an employer based in London to take up a position in Aberdeen. My colleagues were mystified as to why I would want to move away from the UK’s capital. “What is there in Scotland,” they asked, “that you could not get in London?”