Remember that last scene in Back to the Future?
“Marty you’ve got to come with me,” Doc said.
“Where?” Marty said.
“Back to the future,” Doc said.
Doc tears into Marty’s driveway in the DeLorean time machine and raids the trash can.
“I need fuel,” he said.
He puts some banana peels and the remains of a half-empty beer can into the fuel tank and tells Marty to get in the car. Back in 1985, using food waste for fuel seemed about as far off as flying cars. But now, it’s reality. Welcome to the future.