The essence of animals is a) predation-derived energy/material balance b) mobility
A plant makes has a primary production based energy material balance. Modulo venus flytraps.
Yeah, solar panels obv... as well as windmills etc. But those map to leaf/photosynthesis subsystems, not whole plants. At minimum whole plants need a material extraction and synthesis subsystem working off "soil."
The entire field of carbon capture is trying to answer that question.
Plant carbon comes from co2, with a sun-fueled reaction.
Replicating that on an industrial scale is needed to mitigate well, civilization
still a functional view though
an intensional view of plants qua plants is more generally an ambient-energy powered material-upcycler in entropic terms