What's the main difference between a "electric scooter" and a conventional scooter?

Native speaker’s answer
Rebecca
Electric scooters are more sustainable (environmentally-friendly) than conventional scooters because they don't use petrol and run on electricity, which can come from a variety of clean energy sources (like hydro or wind power). You only need to charge them to drive them, so they have zero carbon emissions compared to conventional scooter. Ex: I recently purchased an electric scooter for my work commute. Ex: My city is quite small, so it's easy for me to get around on my electric scooter.