I will present you the new. I will talk to you about electric cars at the cars show.
Electric cars become again fashionable because of there ergonomic design. They must protect Earth and are less polluting than petrol run cars. Also, they are more economical.
J'ai regroupé et arrangé plusieurs de tes phrases, car il y avait trop de répétitions. J'espère t'avoir aidé ;)