Why is everything associated with a "organic" foods or "green" living so expensive?

Why is it so expensive to live organic and green? Where food is concerned, organic products are much more expensive than non-organic products. I just read an article that Honda has introduced a vehicle that is similar to the Civic and runs basically on water. Yet a 3 year lease of the vechicle costs 0 per month. I know that the technology that allows a vehicle to run on water is not at all new. So why is green living so expensive? At a time when our planet really needs to use alternative fuel sources, the overwhelming majority of people cannot begin to consider a change because our economy is in such bad condition. How is someone that is just getting by supposed to get on this bandwagon?