Horsepower or pedal power? Four wheels or two? Can we have both during a climate emergency? Yassmin Abdel-Magied is a writer, broadcaster, social advocate and one-time racing car engineer. Her upcoming book later this summer is Stand Up and Speak Out Against Racism. Roma Agrawal – also known as Roma the Engineer – is a structural engineer, author and broadcaster, whose expertise helped build the Shard skyscraper in London. Her latest book is, Nuts and Bolts: Seven Small Inventions That Changed the World (in a Big Way). These two mechanical minds are both intrigued by the engineering marvels that make the world go round, but Yassmin says we should do it with four wheels in a car, and Roma with just two on a bicycle. Coco Khan is your host with the roadmap to victory and there can only be one winner – you the listeners decide – follow the link below to cast your vote.

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