Regarding the energy grid a reader writes,
All we need is energy storage, aka batteries, and we don’t need any fossil fuels at all, even for back up.
The problem is that not all energy storage solutions fit the bill. The requirements of “back up” are that it fires up and comes online fairly quickly, so a lot of energy storage solutions will fail that requirement. Fossil fuels tend to give up a substantial portion of their energies fairly quickly; batteries also do, but their energy density is not yet sufficient to the task at hand.
So I view this ‘all we need‘ phrase as a bit … misleading …
