For thousands of years, species lived in earth exposed to what nature and evolution did bring to the plate. So many combinations of atoms into molecules populated this planet. Until mankind learned to handle those pesky atoms and started exploring new combinations.
Considering that dwellers of large cities around the globe seem to have more in common than with each of their countrymen, a possible political development where cities bundle in a (UCW) United Cities of the World state of sorts seems not far fetched.
The German minister of transportation has single-handed suddenly approved the introduction of XXL-Lorries in Germany. Likely this will roll-out in the rest of Europe—otherwise it would be meaningless. Officially, the measure is meant to reduce CO2 emissions.