Cell phone interrupter : It blocks reception within 100 feet of the the device.(there must be thousands of underground versions of these out there already)

Lightning collectors: With a large antenna the current at the base branches into hundreds of lines that have a capaciter so that when the current gets to the storage battery the current is less than 20,000 volts per line.


Driveways that have a ramp to a platform that slowly decsends by spinning a drivewheel that powers a electric generator.
Larger versions for stretches of overpasses.

Pipe the methane from sanitation water treatment plants to nuke plants to supplement their steam driven turbines.

Shoping cart momentum collectors that power an electric generator. (home version goes on the refridgerator door.

Barometer turbines. Uses the pressure changes to power a generator.
Since they have to be huge - use Georgian silver stripe paint to make them festive.

Casimir effect architecture (large flat plates are built into large buildings.

Use the dog pee collected with canine pee recepticles to make fertilizer.

Hyperdimensional energy recovery system. Antennas at the equatorset at a 19 degree angle.

Computer keyboard energy collectors.

Use the 3 million strong prisoner population of the united states to collect the ennergy of inmates when they do jumping jacks.

Solar powered dildos.

Ignite Jupiter, collect energy with solar cells.