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The planet has been ice-free in past interglacials, e.g. the last interglacial (before the current Holocene) was warmer than the current. Earth becoming like Ve

The planet has been ice-free in past interglacials, e.g. the last interglacial (before the current Holocene) was warmer than the current. Earth becoming like Venus would take far more terraforming than it would take to turn Mars into a new Earth, probably comparable to turning Venus into an Earth-like planet - i.e. it is not going to happen. In "a few thousand years" [1] the temperature will drop precipitously and we'll be heading for the next ice age if the pattern from the last ~2.5 million years holds. In other words, enjoy the warmth while it lasts, it is sure to get very cold again sometime in the future... [1] which can mean anything from "soon" to "100.000 years" depending on who does the talking

lamontcg 5y ago
A carbon level of 1,000-2,000 ppm will prevent that interglacial from happening and will melt Antarctica by that point in time. For the past 1,000,000 years, through many interglacials, the carbon level has never exceeded 300 ppm. If you look at what "should" be happening right now then we should be cooling. The last interglacial ended 10,000 years ago and the fast Milankovich cycle caused by oscillations of the axial tilt is in a cooling (decreasing tilt) trend. If prior ice age cycles held we should be seeing cooling and the formation of continential glaciers in northern Canada. That natural cycle has been decisively broken.