I Will Ask You Questions - Now with MORE fantasy ecology!

These are interesting questions, could I have one too?

Imagine that most of the world were to suddenly have all of their energy needs met with renewable energy which requires minimal maintenance and is consistently functional, instantly obviating any reliance on fossil fuels. This would include cars (which are now all electric), house heating (all natural gas replaced with electric), etc. What would be the new primary source of international conflict, and how would America and China respond to it?