I got given a hydroponic system the other day, I'm pretty excited about it. Its a conventional Nutrient Flow Technique system big enough for about 15 tomato plants which is a pretty decent number of tomatoes, peppers whatever. Iv gained some enthusiasm for hydroponics from work and see it on the same level of environmental impact as watching tv riding in a car going shopping etc. Many of the fresh vegies we eat are grown hydroponically and for people with limited space its an option I would recommend considering.
Much cooler would be if I used it as an aquaponics system in conjunction with the pond I'm turning the pool into. This would be much more sustainable an low impact and would be a really cool demonstration unit to the public. Iv read some stuff by the new alchemy institute that makes aquaponics sound workable but have to do some more detailed research.
Peak oil is seeping into popular culture, apparently it was the lead item on the news a few days ago saying that oil would peak in 3 - 5 years. Whether this chatter turns into action is highly unlikely but the more people know the better. Also urban self sufficiency is popping up a lot in garden and current affairs shows, I really think greenies could capture interst rather effectivly if they tried.
Im reading the upside of down at the moment and from what I have read I highly reccomend it. The description of the Roman collapse caused by diminishing returns from agriculture and the complex nature of the Roman civilisation is fascinating and definetly deserves a post.