The document proposes using composite materials to build cars in order to make them lighter, more fuel efficient, and cheaper to produce while maintaining safety standards. This would help address economic and environmental issues with current cars that consume large amounts of fuel. The summary received positive feedback from readers who saw benefits like reduced fuel costs, a cleaner environment, and safety not being sacrificed for weight reduction. Engineers were curious about whether engine changes would be needed. The authors want to share their idea with the CEO of Ford to get his perspective on sustainability issues with current cars and his vision for cars of the future.