"Electric bikes are more than 10x more efficient than electric passenger cars, meaning the same amount of battery needed for a 20-mile commute in an electric car could power an e-bike for over 200 miles"
Electric bikes are generally pedal assist. They require you to pedal, but make it as easy to pedal up a hill as to go on a flat street.
They're less exercise vs a regular bike, but you still get a good bit of exercise. Perhaps more exercise, if the e-bike causes you to bike something you would have driven instead.