This morning's 3am bright idea: home hydro!
We have options for residential solar and wind power already, so why not also hydro?
Rain falls from the sky onto your roof, then flows into the gutters, then down a drainpipe to the ground and on into the stormwater system. What if we put a bunch of tiny spinny wheels inside the drainpipe? Think of all the electricity we could generate during all those once-in-a-century tropical storms that have started hitting us multiple times a year!
I guess now we just need some engineers to redesign the basic drainpipe to optimise spinny wheel spinning, and make it accessible for maintenance.