Nature has its own economy, a complex system of exchange, competition and cooperation. In many ways, nature's economy is like our economy. For example, the economy of nature contains producers and consumers and avenues of exchange between them, food chains and webs (Chiras, 1995). But lest we forget, the human economy is really only the smaller economy in nature. The human economy is possible only because of nature. All food and materials come from the soil, water, air, and biota. Ultimately, our wealth is derived from earth.

Unfortunately, the human economy has grown so dramatically that it is destroying the larger economy that powers it says Chiras, 1995. After

According to (Hales 1999) there is recent evidence that the health status of infants is influenced by absolute and relative income at national, community, and individual scales. Several studies have suggested that national infant mortality rates are related to income distribution within countries, after control for confounding factors including national income. In these studies, national income was generally estimated from gross national product (GNP) per person in that country. If there are ways in which we can overturn this dilemma and eliminate infant mortality we will see a survivorship curve similar to Figure 2b.

UNAIDS (1996) Global estimates of the HIV/AIDS epidemic.

Demography is the study of the internal composition of populations and the effects of that composition on the population growth (Microsoft Encarta 2000). Age is an important structuring component for many populations because fertility and survivorship frequently vary with age. One species whose fertility and survivorship is affected by age is humans (Homo sapiens).

The procedure for gathering cohort information at Forest Hill Cemetery is as follows. Select at least two specific cohorts in the cemetery ranging form 1840-1899. Analyze 100 or more tombstones for birth date, date of death and sex of the individual. After completion the data was analyzed and age of death was determined. The data was then put into a table separated into age class at ten-year intervals. When this task was completed data was analyzed for survivorship data and calculations were performed and log calculations as well. Following completion of calculations, data was analyzed in Excel and three graphs were formed with a report.

http://encarta.msn.com c 1997-2000 Microsoft Corporation.

Hales, S. (1999) National Infant Mortality Rates In Relation to the Gross National Product, Lancet, 1-2.

Some common words found in the essay are:
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