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The only thing that could bring on a second ice age would be a warming of the oceans, and the resulting increase in precipitation. It is not happening.
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Or, an ice age could be brought on by cooling, eventually causing the winter’s snowfall to not melt over the course of the following summer, causing a continuously increasing snowpack, increasing reflection of the sun’s energy, causing further cooling...
The remainder is left as an exercise to the reader.
Not talking about an ice age, but rather the minimum which is baked into the cake.The Left will pivot to ICE AGE COMING when their warming thesis is too obviously bunk and will not mention AGW again. It will all be CATASTROPHIC AGC.