Please show me what percentage (or any non-modeled number) of that rise is due to human activity. Now, we can talk about solutions.
If they replaced it with a standard lead acid it would have been flying already.
Few large airplanes use lead-acid batteries anymore. NiCad is pretty standard for anything larger than a Cessna 210.
Practical people would be more practical if they would take a little more time for dreaming. -- J. P. McEvoy