One of the commonly heard aphorisms of reasoning is that correlations do not imply causation. It is good to be periodically reminded that correlations themselves can sometimes be so high as to suggest causality and this site offers a few amusing spurious correlations, reminding us to not be seduced into taking them seriously.
Here is one example where the correlation coefficient is 0.992558, an almost perfect correlation, between the divorce rate in Maine and the per capita consumption of margarine in the US over time.
But like most absolutist assertions, the statement that correlation does not imply causation needs to be qualified. Sometimes correlation can strongly suggest causation if there is a plausible causal mechanism at play that goes only in one direction and that direction far more likely than the other possible causal directions.
For example, the fact that the rise in average global temperatures correlates with the rise in atmospheric greenhouse gases is strongly suggestive that the former is caused by the latter because we can independently explain why greenhouse gases are increasing and there is a mechanism that shows how they inhibit the loss of heat from the Earth.
On the other hand the reverse direction of causation, that a rise in average temperatures causes an increase in greenhouse gases, is far less plausible because we would then still need to explain the cause of the temperature rise and then suggest a mechanism that explains why it leads to a rise in greenhouse gases.
A third possibility is that the two effects do not cause each other but are both caused by some third factor. But again that needs to be fleshed out more before it can be taken seriously.