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EARTHWATCH. 1992 Jul-Aug; 6-9.For the past several decades ecologists and economists have been engaged in a debate. Ecologists have a philosophy that is based on the belief that the carrying capacity of the Earth refers to the integrity of ecological systems. Economists have a philosophy that is based on the belief that the carrying capacity of the Earth refers to human welfare. There has been some progress in the debate. Economists are now starting to realize that ecology must be factored into economic models. This is especially true when economics are dependent on something ecological. Food production is a classic example. If the ecology is damaged to a certain degree, then it cannot grow food and food prices rise in that area. Ecologists are now starting to realize that economic markets are good places to make changes in the ecology. Tax credits and government subsidies of money or land are examples of economic forces that can be harnessed to protect the ecology. Population is a factor of great importance, but consumption is equally as important. Every year Bangladesh adds twice as many people to its population as the US, yet each American consumes 20 times more energy than each person from Bangladesh. So while the population growth rate in developing countries does legitimately threaten the ecology, so does the high consumption levels in developed countries. To the credit of the economists, technology and innovation has to date managed to solve all the major problems humanity has created. But, to the credit of the ecologists, there are several very serious problems, E.G., deforestation, decertification, drought, famine, global warming, and ozone depletion that do not appear to have imminent solutions. As ecological conditions worsen, economists and ecologists will continue to work more closely if for no other reason than necessity.