A short post with a question of counterfactual history.
The Celsius temperature scale developed by Anders Celsius (1701–1744) himself had 0 °C at the boiling point of water and freezing was 100 °C.
It had the advantage that negative numbers would not occur in normal use. Daniel Gabriel Fahrenheit (1686–1736) achieved this for his temperature scale by choosing the lowest temperature in his village or a brine mixture as zero. Negative numbers may well have been controversial at the time. Only in the 17th century the idea of negative numbers was accepted by western mathematicians.
The forward scale we are used to was independently developed by several of Celsius' contemporaries. What would have happened if we had kept to original Celsius scale?
In forward degrees Celsius global warming produces an upward curve. In our current culture that is associated with progress and growth.
In the original Celsius scale the same plots would look more depressing like this.
If the temperature graphs had looked like the graphs of Arctic sea ice would that have changed the course of history? Would we have taken the problem seriously in the 1990s?