Vehicle giant Tesla has delivered its first electric semitrailers in the US, with chief executive Elon Musk promising the trucks would "look like an elephant moving like a cheetah" and provide a "step-change" in transport and emissions.
The electric trucks were delivered to PepsiCo at Tesla's Gigafactory in Nevada before a large in-person audience on Friday and an online contingent of more than 30,000 people.
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