Much of Southern Europe is windswept desert. Huge social change has taken place. London and Cardiff are regularly flooded. There are no more roads than in the year 2000, and there are fewer vehicles on them. These vehicles are mainly electric and fuel cell powered, with zero emissions.
Public transport serves every area, and is partly underground.
It is cheap, publicly subsidised, quick and efficient. Houses cannot at first be seen, because the area of forest is ten times what it was in 2000. When you get used to spotting them, you see houses and clusters of dwelling units everywhere, but are built into the landscape. Most are partially underground, with south facing windows, surrounded by orchard or agroforest. Cows graze under the fruit trees.