Very unlikely.
A wiki quote...
and another
So, possibly, would temperature came down because of a drop in human population. But the drop in temperature stopped, then temperature has massively increased.
The most likely explanations seem to be:
CO2 released into the atmosphere - a massive majority of climate scientists believe this to be the case.
Population growth
Neither of these can be considered to be natural for the earth, so saying "climate has always changed" to explain the sudden increase doesn't really hack it. Unless it comes from an oil company or a consultancy wishing to limit any damage to the fossil fuel industries.
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