I honestly think the best advancements aren't going to be battery technologies for mass transit(at least for the next hundred years or so). Which lead me to rea

I honestly think the best advancements aren't going to be battery technologies for mass transit(at least for the next hundred years or so). Which lead me to read about a group working on creating Biodiesel from algae[1]. Turns out they can have our waste (sewage) fed into vats with algae and providing the algae with nutrients to grow. They then dry/squeeze out the algae and due to the high amount of lipids produce oil and in turn it into oil (although low quality). The amazing part about this process is algae converts carbon to oxygen more efficiently than plants, and can only introduce as much carbon as it removes from the atmosphere. Therefore process would actually produce the same amount of carbon emissions as it reduces. Battery power is slow growing and will take many years (perhaps hundreds) based on the current rate to reach the efficiency of oil... So this seems like a better alternative to me. [1] http://algae.illinois.edu/Projects/BiodieselProduction.html http://algae.illinois.edu/Projects/BiodieselProduction.html