"Just because the model is faulty, it doesn't invalidate the effects of climate change." ... sorry, but (IMHO) of course it does. We have (IMHO) little idea about the interactions in the environment, we keep getting surprised by things when we go looking (oh look, here's a natural source of free Cl molecules in the south pole, possibly the source of the free CL molecules at altitude, and not our CFCs).
Sure we can say that humans are impacting the natural environment (of course we are), in so many ways. The only way to stop is to "stop" ... but then removing ourselves from the system is changing the system. I agree ... ignoring our impact on nature is something we do at our peril. I agree that capitalism is flawed ('cause there is no way to determine the true cost of anything, only the price we're willing to pay). But capitalism is still the best mechanism for allocating resources between alternatives.
"Keep politics out of this" ... sorry, that's impossible.
"... unfettered capitalism" ... sorry, you don't want to see unfettered capitalism ! (think of late 1800s, early 1900s Victorian or US "robber barons") What we have today is quite fettered capitalism, with all the government interference, and government interference means politics. The most we can hope is that this interference is heading in the right direction, eg cleaning up pollution, requiring anti-polluting (or pollution reducing) devices.
"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.