This video shows why we need a life cycle approach to vehicle emission evaluations. In the world today, regulations are concentrating on tailpipe emissions, but that's only part of the story. In order to get the complete "tail" it's critical to evaluate the entire life cycle from material manufacturing to end of life disposal. Otherwise, all the attention is on trying to get fuel economy at whatever cost--and the environmental cost of alternative materials is high. Yeah, this is also a pitch for steel--but when you see the numbers and the very low impact steel has on the environment, you'll understand why steel is so green.