From Russia to China to Pakistan to Britain ....

[OwlHoot]

Fossil fuels are going to run out within the forseeable future (remember, even 1000 years is like the blink of an eye in planetary terms), on the way they will also become prohibitively expensive to use. Both of these factors will reduce their use - problem solved.

In 100 years, barring holocausts and so on, there will be tens of thousands of square miles of efficient solar cells, and/or tanks of genetically modified algae, right across North Africa and in Australia, churning out as much oil as we all use today - It, or some organic chemicals like it, will still be needed for manufacturing plastics and fertiliser etc.