Canada orders automakers to halve emissions November 27, 2012 Canada orders automakers to halve emissions Well, I think it's possible as there's materials coming out that are much stronger and lighter. I wouldn't be surprised if we can do this.
I can't imagine why we don't just collectively elect to suspend the laws of physics. They're just keep getting in our way.
Actually, we already have the technology to do this. The Prius and the C-Max Energi Ford have shown that it can be done.