Today is Blog Action Day and the topic for the year is water. Access to fresh water is an increasing problem around the world as the combination of increasing population and climate change leave more people without it. Many people get their fresh water from glacial runoff or from aquifers, and the one is melting away and the other is being drained.
Of course there is no shortage of water in the world. There isn’t even a shortage of fresh water. The problem is one of getting the fresh water where the people are; moving people somewhere else is mostly infeasible.
Jerry Pournelle had a series of short stories in the ’70s which involved moving icebergs to get fresh water for irrigation. I always thought that was a great idea. You would have these huge icebergs slowly moving across the oceans. Unfortunately, I don’t think it pans out. Icebergs are really heavy to move around the ocean, and moving them outside of the ocean is impossible. Any place you can move an iceberg, you have plenty of water; it’s just not fresh. The energy it takes to move an iceberg would be more efficiently used doing desalination. Pournelle’s stories weren’t completely crazy when it wrote them, but desalination technology has come a long way, and the physics of moving an iceberg is never going to change.
The successful use of desalination in places like the United Arab Emirates and Israel shows that the problem of access to fresh water is one of energy and infrastructure. It’s not really a typical scarce resource problem. The problem for the world is the large number of poor people with decreasing fresh water supplies. Transporting water is expensive and requires a lot of infrastructure work, particularly if you have to do it uphill. Poor people have no money to spend on doing it. Nobody is likely to do it for them.
The most efficient way to get people water is likely going to be to significantly increase reuse, and to shift agriculture to areas where water can be provided more cheaply. Increasing reuse also requires infrastructure, but it’s cheaper to build than long pipelines. Shifting agriculture has its own set of issues, but it’s likely to be easier to move food than to move people.
The last thing I have to say about water concerns privatization. There is no substitute for water, and it is needed daily, so people will pay any price to get it. Creating alternative water distribution mechanisms is extremely expensive, and to my knowledge has never been done. Putting a private company in charge of water distribution means granting a monopoly for a price inelastic good to a profit seeking entity. There is an enormous incentive to jack up prices as high as the market will bear, which is to say almost all the money available. There is little incentive to invest heavily in new infrastructure, since the company is already absorbing all the available money. That is admittedly the extreme version of what can happen, but really it can not end well, and in general, when it has been done, it has not ended well. Privatization can work well when it creates a competitive market. Water distribution is never a competitive market. Of course there are roles for private companies in the water system, but only in some sort of public/private partnership.
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