The World's Resources Aren't Running Out

Ecologists worry that the world's resources come in fixed amounts that will run out, but we have broken through such limits again and again

Click here to read this WSJ article by Matt Ridley. Excerpts:

""We are using 50% more resources than the Earth can sustainably produce, and unless we change course, that number will grow fast—by 2030, even two planets will not be enough," says Jim Leape, director general of the World Wide Fund for Nature International (formerly the World Wildlife Fund). 

But here's a peculiar feature of human history: We burst through such limits again and again. After all, as a Saudi oil minister once said, the Stone Age didn't end for lack of stone. Ecologists call this "niche construction"—that people (and indeed some other animals) can create new opportunities for themselves by making their habitats more productive in some way. Agriculture is the classic example of niche construction: We stopped relying on nature's bounty and substituted an artificial and much larger bounty.

Economists call the same phenomenon innovation. What frustrates them about ecologists is the latter's tendency to think in terms of static limits. Ecologists can't seem to see that when whale oil starts to run out, petroleum is discovered, or that when farm yields flatten, fertilizer comes along, or that when glass fiber is invented, demand for copper falls.

That frustration is heartily reciprocated. Ecologists think that economists espouse a sort of superstitious magic called "markets" or "prices" to avoid confronting the reality of limits to growth. The easiest way to raise a cheer in a conference of ecologists is to make a rude joke about economists."

"the Intergovernmental Panel on Climate Change's recent forecast that temperatures would rise by 3.7 to 4.8 degrees Celsius compared with preindustrial levels by 2100 was based on several assumptions: little technological change, an end to the 50-year fall in population growth rates, a tripling (only) of per capita income and not much improvement in the energy efficiency of the economy."

"Most economists expect a five- or tenfold increase in income, huge changes in technology and an end to population growth by 2100: not so many more people needing much less carbon."

"the amount of land required to grow a given quantity of food has fallen by 65% over the past 50 years, world-wide. Ecologists object that these innovations rely on nonrenewable resources, such as oil and gas, or renewable ones that are being used up faster than they are replenished,"

"the ecologist Carl Safina estimates that if everybody had the living standards of Americans, we would need 2.5 Earths"

"E.O. Wilson, one of ecology's patriarchs, reckoned that only if we all turned vegetarian could the world's farms grow enough food to support 10 billion people."

"large parts of the world, especially in Africa, have yet to gain access to fertilizer and modern farming techniques, there is no reason to think that the global land requirements for a given amount of food will cease shrinking any time soon."

"even with generous assumptions about population growth and growing affluence leading to greater demand for meat and other luxuries, and with ungenerous assumptions about future global yield improvements, we will need less farmland in 2050 than we needed in 2000."

"Estimates made in the 1960s and 1970s of water demand by the year 2000 proved grossly overestimated: The world used half as much water as experts had projected 30 years before. 

The reason was greater economy in the use of water by new irrigation techniques."

"The best-selling book "Limits to Growth," published in 1972 by the Club of Rome (an influential global think tank), argued that we would have bumped our heads against all sorts of ceilings by now, running short of various metals, fuels, minerals and space. Why did it not happen? In a word, technology: better mining techniques, more frugal use of materials, and if scarcity causes price increases, substitution by cheaper material. We use 100 times thinner gold plating on computer connectors than we did 40 years ago. The steel content of cars and buildings keeps on falling."

"The economist and metals dealer Tim Worstall gives the example of tellurium, a key ingredient of some kinds of solar panels. Tellurium is one of the rarest elements in the Earth's crust—one atom per billion. Will it soon run out? Mr. Worstall estimates that there are 120 million tons of it, or a million years' supply altogether. It is sufficiently concentrated in the residues from refining copper ores,"

"Or take phosphorus, an element vital to agricultural fertility. The richest phosphate mines, such as on the island of Nauru in the South Pacific, are all but exhausted. Does that mean the world is running out? No: There are extensive lower grade deposits, and if we get desperate, all the phosphorus atoms put into the ground over past centuries still exist,"

"In 1972, the ecologist Paul Ehrlich of Stanford University came up with a simple formula called IPAT, which stated that the impact of humankind was equal to population multiplied by affluence multiplied again by technology."

"greater affluence and new technology have led to less human impact on the planet, not more. Richer people with new technologies tend not to collect firewood and bushmeat from natural forests; instead, they use electricity and farmed chicken—both of which need much less land. In 2006, Mr. Ausubel calculated that no country with a GDP per head greater than $4,600 has a falling stock of forest (in density as well as in acreage). 

Haiti is 98% deforested and literally brown on satellite images, compared with its green, well-forested neighbor, the Dominican Republic. The difference stems from Haiti's poverty, which causes it to rely on charcoal for domestic and industrial energy, whereas the Dominican Republic is wealthy enough to use fossil fuels,"

"Water returns to the environment through sewage and can be reused. Phosphorus gets recycled through compost. Tellurium is in solar panels, which can be recycled. As the economist Thomas Sowell wrote in his 1980 book "Knowledge and Decisions," "Although we speak loosely of 'production,' man neither creates nor destroys matter, but only transforms it.""

"A widely used measure of "ecological footprint" simply assumes that 54% of the acreage we need should be devoted to "carbon uptake." 

But what if tree planting wasn't the only way to soak up carbon dioxide? Or if trees grew faster when irrigated and fertilized so you needed fewer of them? Or if we cut emissions, as the U.S. has recently done by substituting gas for coal in electricity generation? Or if we tolerated some increase in emissions (which are measurably increasing crop yields, by the way)?" 

"ecologists have been using "human appropriation of net primary production"—that is, the percentage of the world's green vegetation eaten or prevented from growing by us and our domestic animals—as an indicator of ecological limits to growth. Some ecologists had begun to argue that we were using half or more of all the greenery on the planet.

This is wrong, says Dr. Haberl, for several reasons. First, the amount appropriated is still fairly low: About 14.2% is eaten by us and our animals, and an additional 9.6% is prevented from growing by goats and buildings, according to his estimates. Second, most economic growth happens without any greater use of biomass. Indeed, human appropriation usually declines as a country industrializes and the harvest grows—as a result of agricultural intensification rather than through plowing more land.

Finally, human activities actually increase the production of green vegetation in natural ecosystems. Fertilizer taken up by crops is carried into forests and rivers by wild birds and animals, where it boosts yields of wild vegetation too (sometimes too much, causing algal blooms in water). In places like the Nile delta, wild ecosystems are more productive than they would be without human intervention,"