"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.
One of the better features of e bikes is that you won't get into sweating or exhaustion as easy as with a regular bike. This means you can just cover yourself in some plastic poncho to stay dry while riding without getting damp inside from sweating.
To add to this you won't sweat as much in heat either because you can wear breathable clothing and the wind from your movement really cools you off substantially on a bike even without pedal assist so with it I'd imagine you'd barely break a sweat barring high humidity.