It is the long term trend that is clear
the long term trend!!?
according to science the earth has had up and down temperature trends and trends within the trends and sub sub trends, etc for 5.000.000.000 years. we have meaningful records of a few hundred of those years at best
picture a graph of the temperatures during this time stretching from chicago to new york. it would take you a few months to walk along cursorily examining the data as you walk along the graph.
THAT would give you some insight into the significance of the trend in the last 50 years or so.
unfortunately we are only able to see the last inch of the graph.
the rest of the graph is “supposed” by unproven theory, speculation, and wild extrapolation which may or may not be valid