  We seek to model the coupled evolution of a planet and a civilization through
the era when energy harvesting by the civilization drives the planet into new
and adverse climate states. In this way we ask if triggering "anthropocenes" of
the kind humanity is experiencing now might be a generic feature of
planet-civilization evolution. In this study we focus on the effects of energy
harvesting via combustion and vary the planet's initial atmospheric chemistry
and orbital radius. In our model, energy harvesting increases the
civilization's population growth rate while also, eventually, leading to a
degradation of the planetary climate state (relative to the civilization's
habitability.) We also assume the existence of a Complex Life Habitable Zone in
which very high levels of $CO_2$ are detrimental to multi-cellular animal life
such as those creating technological civilizations. Our models show that the
civilization's growth is truncated by planetary feedback (a "climate dominated
anthropocene") for a significant region of the initial parameter space.
