Living an environmentally sustainable lifestyle in this culture can be really challenging. I mean, we live in a culture that is virtually dependent on fossil fuels, and which wastes those fuels on a wide variety of spurious things. Now, I think that cars are really important to have, but we need to move away form cars that rely on fossil fuels,. The emissions form a car that runs on hydrogen is water. Whereas I am sure you have all too often noticed that black smoke coming out of the pipes of a truck. Man that stuff is nasty. Every time I have ever breathed in any of that black smoke I thought I was going to be sick. Fossil fuel usage in cars increases the impact of climate change, especially because of the fact that so many millions of people drive every day. I have a neighbor that drives his car to grocery store that is only five blocks away.