What is the purpose of the BMW i8's carbon fiber body construction?

I heard that the BMW i8 has a carbon fiber body construction. How does this contribute to the car's performance and efficiency?

The use of carbon fiber in the body construction of the BMW i8 makes the car significantly lighter, which improves its performance and efficiency. Carbon fiber is also stronger than traditional materials like steel, providing better stability and handling.

Carbon fiber is also more resistant to corrosion and has a longer lifespan compared to traditional materials. It also allows for more innovative and futuristic designs, giving the BMW i8 its sleek and eye-catching appearance.