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Could it ever be possible to run planes on battery? Generate the electricity with solar or whatever else and then store it? Can batteries be made to last the length of long flights?
Hydrogen - Where will you get all this hydrogen from?
Quote from: Don_1 on 19/02/2009 10:14:16 Hydrogen - Where will you get all this hydrogen from?I think its the most common substance in the universe isn't it?.From electrolysis of water.Already hydrogen filling stations in the USA and maybe elsewhere.Cheersjustaskin
it may be better to grow as much food in a hydroponic system than conventionally, as it can reduce seasonality of foods we now take for granted (such as salad) and reduces pesticide inputs.
Hydroponics can make a significant contribution - not just tomatoes - to issues of land use and energy / water consumption in food production. Pretty much anything can be grown hydroponically, with generally higher yields and shorter cropping times than conventional techniques. I would go so far as to suggest that it is the only way that 60 million mouths could be filled with locally grown food.
Who says that we're going to run out of fossil fuels?
We can feed the world with no problems whatsoever. We just need fewer people.
Quote from: Bored chemist on 19/02/2009 20:26:32We can feed the world with no problems whatsoever. We just need fewer people.BC - I'm not sure that that is right, it's just an obvious solution. The earth as a whole can easily sustain this many people, it's just that the processes and resources aren't evenly spread.