Basically, I never understood why (or rather how) a global increase of 1.5° (Celsius) can have as big an impact on the world as it does. How is that seemingly small increase melting the poles so much so that the coastline of many countries in the world might even be pushed back?
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The earth’s climate is a very complicated system and some seemingly small changes to it can have huge consequences.
For example the last ice age was “only” [6 degrees colder than today](https://www.smithsonianmag.com/smart-news/ice-age-temperature-science-how-cold-180975674/), but during that time New York was covered in ice that was higher than the empire state building in some places.
This shows that just a few degrees change in average temperature can have massive impacts on the climate.
This is why we should work very hard to keep the warming as low as possible.
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