Pretty soon there will be renewable grids all over the world. But at the current rate, we will still be relying on planes and ships that chug through huge amounts of fossil fuel. This idea is that governments and philanthropists support those start ups in E-aviation of green hydrogen shipping that are working hard on innovations to change this, now. The world doesn't have a moment to lose. Don't forget, when we have renewable grids, energy efficient buildings won't matter - you can use your air conditioning as much as you want. It is the ships and planes and steel production and cows that will matter, and we need to get onto those problems, now.