A Millionaire with a Super Yacht Is a Larger Strain on Resources Than Hundreds of Peasant Families

It's no coincidence that most of those who are obsessed with population growth are post-reproductive wealthy white men: it's about the only environmental issue for which they can't be blamed. The brilliant earth systems scientist James Lovelock, for example, claimed last month that "those who fail to see that population growth and climate change are two sides of the same coin are either ignorant or hiding from the truth. These two huge environmental problems are inseparable and to discuss one while ignoring the other is irrational." But it's Lovelock who is being ignorant and irrational.

A paper published yesterday in the journal Environment and Urbanization shows that the places where population has been growing fastest are those in which carbon dioxide has been growing most slowly, and vice versa. Between 1980 and 2005, for example, Sub-Saharan Africa produced 18.5% of the world's population growth and just 2.4% of the growth in CO2. North America turned out 4% of the extra people, but 14% of the extra emissions. Sixty-three per cent of the world's population growth happened in places with very low emissions.

Even this does not capture it. The paper points out that around one sixth of the world's population is so poor that it produces no significant emissions at all. This is also the group whose growth rate is likely to be highest. Households in India earning less than 3,000 rupees a month use a fifth of the electricity per head and one seventh of the transport fuel of households earning Rs30,000 or more. Street sleepers use almost nothing. Those who live by processing waste (a large part of the urban underclass) often save more greenhouse gases than they produce.

Many of the emissions for which poorer countries are blamed should in fairness belong to us. Gas flaring by companies exporting oil from Nigeria, for example, has produced more greenhouse gases than all other sources in sub-Saharan Africa put together. Even deforestation in poor countries is driven mostly by commercial operations delivering timber, meat and animal feed to rich consumers. The rural poor do far less harm.

The paper's author, David Satterthwaite, points out that the old formula taught to all students of development -- that total impact equals population times affluence times technology (I=PAT) -- is wrong. Total impact should be measured as I=CAT: consumers times affluence times technology. Many of the world's people use so little that they wouldn't figure in this equation. They are the ones who have most children.

While there's a weak correlation between global warming and population growth, there's a strong correlation between global warming and wealth. I've been taking a look at a few superyachts, as I'll need somewhere to entertain Labour ministers in the style to which they're accustomed. First I went through the plans for Royal Falcon Fleet's RFF135, but when I discovered that it burns only 750 litres of fuel per hour I realised that it wasn't going to impress Lord Mandelson. I might raise half an eyebrow in Brighton with the Overmarine Mangusta 105, which sucks up 850 l/hr. But the raft that's really caught my eye is made by Wally Yachts in Monaco. The WallyPower 118 (which gives total wallies a sensation of power) consumes 3400 l/hr when travelling at 60 knots. That's nearly one litre per second. Another way of putting it is 31 litres per kilometre.

Of course to make a real splash I'll have to shell out on teak and mahogany fittings, carry a few jet skis and a mini-submarine, ferry my guests to the marina by private plane and helicopter, offer them bluefin tuna sushi and beluga caviar and drive the beast so fast that I mash up half the marine life of the Mediterranean. As the owner of one of these yachts I'll do more damage to the biosphere in ten minutes than most Africans inflict in a lifetime. Now we're burning, baby.