[QUOTE=Sam Stone]
You do know that we have a pretty much limitless source of energy shining over our heads, right? The only reason we don’t use more is cost. But we know for certain that if other energy sources became more expensive, we could make solar power. We even know how much it would cost, and it won’t be so high that it will destroy society - maybe two or three times as high as energy costs today, but since we only spend about 7-8% of GDP on energy today, and have spent as much as 14% in the past, it’s pretty clear that society can survive a doubling of energy prices.
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Yes, I happen to work in solar energy, but until we have a reliable method of storage or a global transmission network (preferably HVDC) it isn’t going to solve the problem. I think, from memory, that an area the size of Texas could supply all of the worlds energy needs, but until we crack the storage/transmission problems it’s not likely to happen on anything but a local scale.
[QUOTE=Sam Stone]
But the fact is, once we transitioned to solar, we would expend great effort in reducing its cost, so it probably wouldn’t even cost us that much.
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That’s basically what I do at the moment, the majority of the most efficient cells are made form silicon, which while inexpensive in itself has to go through a number of processes that are expensive. One possible alternative is to use carbon based polymers to replace silicon. These are unlikely to ever be as efficient as silicon, but could be produced cheaper by methods such as printing solar celsl onto flexible substrates. Although at present the source materials are quite pricey as well.
[QUOTE=Sam Stone]
People are resources too, you know.
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Only up to a point, there are limited resources, no matter how clever or technologically advanced we are there is a physical limit to the amount of people the planet can sustain. Not sure what it is, but I’m sure it can be calculated. Probably just down to the amount of Ha of land it takes to feed a person.
[QUOTE=Sam Stone]
Or maybe the more people we have, and the wealthier we all are, the better we’ll be able to handle such shocks. When there’s a heatwave, it’s not Americans who die - they have air conditioning. It’s the poor people in poor countries. Wealth brings options.
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Only up to a point, as someone once said “we are only three meals from anarchy”, cut off the food, water pr power for a few days and see what happens.
[QUOTE=Sam Stone]
To be more accurate, we are running out of certain kinds of energy, maybe. But since we know how to collect energy in many other ways, that’s not the end of the world.
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True, it’s just that the one we are running out of is the one we are most reliant upon.
[QUOTE=Sam Stone]
Maybe that’s because there’s not the kind of agreement that you seem to think there is on what we need to do. Or it could be that governments really suck at this kind of thing.
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I don’t think there is an agreement, I think there should be, but it’s unlikely as everyone is guided by self interest. For example the developing world now wants the standard of living currently enjoyed by the west and are building the coal and gas power stations to achieve it and the cars etc. No-one is saying they shouldn’t have these things, but the price is more energy consumption and faster global warming
[QUOTE=Sam Stone]
You haven’t been paying attention, then. The auto companies are all working feverishly on replacements for the internal combustion engine, and they aren’t very far away from a very good solution - the plug-in hybrid. The first ones will be on the market in a year or two. For commuters in cities, these vehicles will get as much as 500 mpg. Over the life of the typical plug-in hybrid vehicle it could achieve close to 100 mpg. That’s a low enough figure that we can use bio-diesel or ethanol to power them if we have to. Pure electric cars are also on the way.
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I’ve heard of it, hope it will catch on, but I have my doubts, plus even if this were to be introduced tomorrow it would take a decade or two at least to transition over to this type of vehicle.
[QUOTE=Sam Stone]
Are you kidding? A massive joke? My province gets about 2% of its power from wind. That’s not a joke. Texas just approved a 5 billion dollar infrastructure project for wind.
Wind clearly isn’t the sole solution. It’s not even going to make a majority of our power, or anything near that. But it may be that our future energy infrastructure will be very diversified, with a dozen or more different types of energy all contributing to the grid. In that case, wind is a very important component.
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Nope, not kidding. Maybe there are parts of the world where there is a constant (or semi constant wind flow), don’t know I’m not a climatologist, but in the UK we have to have sufficient conventional power generation capability to cover for when the wind is not blowing. Therefore it is no real use.
Certain forms of alternative power have possibilities, tidal power, we are guaranteed two tides a day every day. Solar, as discussed above to name but two, but no-one is seriously investing the amounts of money necessary to achieve these things.
Personally I love the idea of fusion, but unfortunately a working (by which I mean capable of generating power rather than just self sustaining reaction) fusion reactor has been 20-30 years away for as long as I can remember.
For example the ITER will cost about 9.3Bn US$, which given the money available to the members of the consortium is tiny, but the project has still been beset by quibbles over who pays for what and where it was going to be.
[QUOTE=Sam Stone]
Nuclear power certainly is, and if we were faced with a true crisis situation, we could fast-track the construction of nuclear power plants and move a significant proportion of energy to nuclear within a decade.
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I hope you’re right, but it would still take time.
[QUOTE=Sam Stone]
Funny then that food supplies are constantly exceeding all-time highs even as the population has grown dramatically, and that the amount of labor and money that we spend on food production has been declining during the period of fastest population growth in the earth’s history.
Would you mind reconciling that uncomfortable fact with the notion that increased population necessarily means less food for everyone?
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Cite for this assertion, I don’t think it can be true globally, maybe in the US, but certainly not worldwide.