Preindustrial

With substantial and sustained reductions in greenhouse gas emissions, the increase in global annual average temperature relative to preindustrial times could be limited to less than 3.6°F (2°C).

Civilization has already exceeded a global warming of ~1.0◦C above pre-industrial conditions[.]

At last year’s summit in Glasgow, countries agreed to focus on limiting global temperature rises to 1.5C above pre-industrial levels, but recent UN reports have shown that current policies would raise temperatures by about 2.5C.

a preindustrial nation