So way back in the Seventies, I was reading politicized crap about how we needed global plans to cope with the impending Ice Age.
I did a little reading, and noticed a study that reported a sharp temperature spike of ten to twenty years' duration, supposedly immediately before the onset of every studied ice age....
melting ice produces fresh water at 36F, which is as dense as water gets. Ice floats, ice melt sinks. Deep oceanic water is that temp. The thickness of that bottom layer must vary, and must decrease when ice packs are depleted and ice melt flows decrease.... and saline mixing flows decrease as well...… meaning surface temps and temps at depth both rise in such a situation.
At any rate, the magnitude of temp changes associated with ice ages/interglacial warm periods is about 10 C plus or minus about 3C.
Some estimates of the CO2 content of our oceans place it orders of magnitude larger than our atmosphere, with an equilibrium that is highly affected by water temps....
So in my estimation, the proposed "thermostat' process for earth climate is on a scale that could prevail over our fuel use in longer time spans.
But political players with schemes for personally enriching themselves, or grabbing more political power, are not any kind of people to entrust with our welfare. They don't care what is "truth", nor do they care what happens from their games/policies. If they are obviously proven to be dead wrong, they'll be out in front of cameras the next day with some "new" scare they proclaim to be solving.... for their own advantage once again....