I think your right but smoking it may not be the best intake. Especially, if you are smoking paper, glue, and cellulose acetate (a plastic) the filter.
Maybe that is what causes cancer... or maybe its the smog on the highways??
I read this thing about portable farms at http://sandiego.craigslist.org/nsd/sls/1045384682.html
There website is http://www.portablefarms.com I think that they have a good idea with their sheds and fish farms.
I would like to have access to one... its like a fish pond and garden in one.
I also heard of this thing called permaculture in peru. It was a novel idea where they grew plants that helped eachother together. Like natural pesticides and legumes to help the soil.
Wow that is a simple great idea! I was thinking about toilet batteries using urine to create electricity with copper sulfate I believe. But this is a great idea and I will start doing it since I am in california. Can we donate our urine to farmers?? If its that much of a drought maybe we can ship urine in gas trucks or something.