Like all good ideas regarding electricity, Tesla already had it.<p>Tesla coils operate in reverse to turn high-voltage into high-current. This was the base of Tesla's idea for wireless electricity. One Tesla coil can deliver power through the air to another coil, however it typically only has a fraction of the power of the input. However Tesla coils are capable of receiving atmospheric electricity (lightning) and outputting current, however only Tesla appeared interested in this.<p>A large enough Tesla coil could survive a lightning strike and produce huge amounts of high voltage direct current, which is incidentally exactly what's required for producing hydrogen.<p>It would be nice to see a company build a large tesla coil capable of surviving lightning strikes to produce hydrogen for fuel cell vehicles.