Having not read the source material referenced by OP, the biggest concerns I have (that are not commonly addressed) are as follows:<p>1: increased ocean acidity due to CO2 dissolving into water. A lot of the smaller lifeforms (coral, others) rely on calcium carbonate for exoskeletons, even small changes in PH can greatly reduce their capability to extract such from the water. There will also be many more unexpected implications, so the total impact on ocean biomes is unknown.<p>2: global warming means more <i>energy</i> in the weather systems, which means greater fluctuations and more chaotic weather, not necessarily just a small increase in average temperature. Think bigger hurricanes, more severe floods and droughts, higher winds, etc.