As the vast majority of climate peer-reviewed studies confirm, there were multiple periods in the geological and ancient past that exhibited, not only extreme climate change, but also hotter temperatures prior to the modern era's huge industrial/consumer greenhouse gases.
This new study regarding the Arabian Sea temperatures during winter seasons adds to the mountain of evidence that current climate change is of a less extreme variety, despite the gigantic CO2 emissions.
And as this other study indicates, that extra CO2 has provided substantial benefits to the biosphere.