While the IPCC painstakingly establishes what the world should expect from climate change, Al Gore only tells us what to fear.
This year's Nobel peace prize justly rewards the thousands of scientists of the United Nations climate change panel (the IPCC). These scientists are engaged in excellent, painstaking work that establishes exactly what the world should expect from climate change.
The other award winner, former US vice-president Al Gore, has spent much more time telling us what to fear. While the IPCC's estimates and conclusions are grounded in careful study, Gore doesn't seem to be similarly restrained.
Gore told the world in his Academy Award-winning movie (recently labelled "one-sided" and containing "scientific errors" by a British judge) to expect 20-foot sea-level rises over this century. But his Nobel co-winners, the IPCC, conclude that sea levels will rise between only a half-foot and two feet over this century, with their best expectation being about one foot - similar to what the world experienced over the past 150 years.
Likewise, Gore agonises over the accelerated melting of ice in Greenland, but overlooks the IPCC's conclusion that, if sustained, the current rate of melting would add just three inches to the sea level rise by the end of the century. Gore also takes no notice of research showing that Greenland's temperatures were higher in 1941 than they are today.
Gore also frets over a predicted rise in heat-related deaths, without mentioning that rising temperatures will reduce the number of cold spells, which are a much bigger killer than heat. The best study shows that by 2050, heat will claim 400,000 more lives, but 1.8 million fewer will die because of cold. Indeed, global warming will actually save lives.
The IPCC has magnanimously declared that it would have been happy if Gore had received the Nobel peace prize alone. I am glad that he did not.
Unfortunately, Gore's prize will only intensify our focus on climate change to the detriment of other planetary challenges.
Gore concentrates above all else on his call for world leaders to cut CO2 emissions, yet other policies would do much more for the planet. Over the coming century, developing nations will be increasingly dependent on food imports from developed countries, not primarily as a result of global warming, but because of more people and less arable land in the developing world.
The number of hungry people depends much less on climate than on demographics and income. Extremely expensive cuts in carbon emissions could mean more malnourished people. If our goal is to fight malnutrition, policies like getting nutrients to those who need them are 5,000 times more effective at saving lives than spending billions of dollars cutting carbon emissions.
global warming will probably slightly increase malaria, but CO2 reductions will be far less effective at fighting this disease than mosquito nets and medication, which can cheaply save 850,000 lives every year. By contrast, the expensive Kyoto protocol will prevent just 1,400 deaths from malaria each year.
While we worry about the far-off effects of climate change, we do nothing to deal with issues facing the planet today. This year, malnutrition will kill almost 4 million people. Three million lives will be lost to HIV/Aids. Two and a half million people will die because of indoor and outdoor air pollution. A lack of micronutrients and clean drinking water will claim two million lives each.
With attention and money in scarce supply, we should first tackle the problems with the best solutions, thereby doing the most good throughout the century. Focusing on solving today's problems will leave communities strengthened, economies more vibrant, and infrastructures more robust. This will enable us to deal much better with future problems - including global warming - whereas committing to massive cuts in carbon emissions will leave future generations poorer and less able to adapt to challenges.
To be fair, Gore deserves some form of recognition for his resolute passion. However, the contrast between this year's Nobel winners could not be sharper. The IPCC engages in meticulous research where facts rule over everything else. Gore has a very different approach.
In cooperation with Project Syndicate, 2007.