Have a look at some scenes from cities of the world, with 2 degrees of global warming compared with 4 degrees of warming.

Or use these diagrams against a world map to see maps of water damage to cities with unchecked pollution or a 2 degree or 4 degree temperature change.

Why is the UK government spending billions on the historic Houses of Parliament and Big Ben when they will be underwater with the planned 2 degrees of temperature.

And if the politicians are able to hold the very long term threat to 2 degrees and stop methane or other gases that cause accelerated warming from having any effect, or the odd storm or tsunami from destroying riverside buildings and other expensive soggy properties.