Carbon Dioxide through Geologic Time Introduction Since of the Earth's atmosphere is out-of-balance with the conditions expected from simple chemical equilibrium, it is very hard to say what precisely sets the level of the carbon dioxide content in the air throughout geologic time. While scientists are fairly certain that a million years ago carbon dioxide values were many times higher than now, the exact value is in doubt. In very general terms, long-term reconstructions of atmospheric CO2 levels going back in time show that million years ago atmospheric CO2 was some 20 times higher than present values.
It is simply to give you an indication on how much carbon dioxide you generate and how many trees it would take to offset those emissions. Bear in mind that just about all we do in modern life produces a carbon footprint, well over and above what occurs in the natural world.
For instance, the computer you are viewing this on was produced using processes that create carbon emissions.
Offsetting should be seen as a last resort; reduction in consumption is the first line of defense against global warming.
Unlike many carbon footprint calculators available on the web, I thought I'd let people know how these figures are arrived at in my script. The calculations are based on the following: Household electricity is based on a figure of 1.
This calculator assumes that 5 trees should be planted to ensure that at least one lives to 40 years or that their combined sequestration equals 1 ton. General waste is based on the USA average5 carbon dioxide emission equivalent of pounds per person per year. The food aspect of the calculation is based on a vegan diet; i.
Based on the average American diet generating the equivalent of 1. Sightline Institute 2 Source: Trees for the Future 3 Source: Various studies from around the world; averaged 4 Source: University of Chicago study, May 5,6,7 Source:Carbon dioxide emissions calculator.
This carbon dioxide emission calculator will help you gain an approximate idea of how many tons of carbon dioxide some of your activities generate and how many trees it would take to offset those emissions - free to use!
Carbon sequestration - artificial vs natural. Carbon sequestration is a term you will increasingly hear over the coming years. This article provides a basic explanation of what it is, some of the suggestions of how humans may go about artificial sequestration and some of the unknown and dangers involved.
Greenhouse Gas Concentrations: Natural vs man-made (anthropogenic) 1. The following table was constructed from data published by the U.S. Department of Energy (1) and other sources, summarizing concentrations of the various atmospheric greenhouse gases.
Because some of the concentrations are very small the numbers are stated in parts per billion. In prehistoric times, during the Permian, in the Palaeozoic Era, for example, the concentration of Carbon Dioxide dropped below ppmV.
Throughout the Permian Period plant and animal species diverged and diversified as never before. Most scientists agree that carbon dioxide has decreased over the last million years because of speeding up of the passage of carbon atoms from their volcanic sources into vetconnexx.com we learned in the last section, to lower the CO 2 content one needs fresh rocks to provide calcium, and it also helps to bury organic matter.
Fresh rocks are provided through plate collisions and mountain. Secondly, the concentration of carbon dioxide in the atmosphere rose about 20 parts per million (ppm), from ppm in the early Holocene to ppm in the late Holocene, whereas carbon dioxide was typically stable or declined over other interglacial periods.