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Another Large Source of Carbon Dioxide

Consider that in 1804, the human population reached 1 billion people. In 1928, 124 years later it reached 2 billion people. In 1960, the world population became 3 billion people in only 32 years. Then in 1976, 16 years later the population reached 4 billion. Twelve years later, the world population exceeded 5 billion. Presently we have more than 7 billion people on the planet and at this rate, another billion in less than 10 years.

Consider, the following facts;
1. The average human breathes about 30 times per minute.
2. That the human lung exchanges about 4.5 liters of air each breath.
3. The carbon content of the average exhaled air is about 5.5% carbon dioxide.
4. Carbon dioxide weighs 1.8 grams per liter
5. World population is 7 billion people
6. World industrial CO2 is 6,000 million metric tons

Using these data, a series of short calculation shows that a single human exhales about 7 metric tons of CO2 per year. Since presently there are about 7 billion humans on the planet, the breathing of the human population produces about 49,000 million metric tons (MMT) of carbon dioxide per year. Compare this with the 6,000 MMT produce by all global industrial activities. Thus, population growth appears to be 800% larger factor affecting the increase in atmospheric CO2 than industrial activities including the burning of fossil fuels. This factor cannot be ignored if global warming is to be stopped.

Pulling on this string unravels a whole host of alarming conclusions. For example, there are considerably more than 7 billion other species that metabolizes on this planet. The combine CO2 produced by those species is estimated to be at least an order of magnitude higher, i.e. 500,000 MMT. If global warming is such a critical problem, is it wise to exclude any major producer.



By D Dodds

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