>All the other data used to create the original graph o calculate temperature such as tree rings, etc do not take into account the temperature of the oceans, et

>All the other data used to create the original graph o calculate temperature such as tree rings, etc do not take into account the temperature of the oceans, etc https://en.wikipedia.org/wiki/Proxy_(climate)#Corals https://en.wikipedia.org/wiki/Proxy_(climate)#Corals