Carbon dating wine
This is known as the breakeven point between the two wines, and Colman and Päster actually calculated a "green line" down the middle of the United States that marks the point at which a shipped wine and trucked wine would have the same carbon footprint.Miles and transportation method aren't the only consideration though, as packaging can influence transportation efficiency.If you live in San Francisco, you can get your wine from the many California vineyards; but if you live in New York, it may be more environmentally friendly to buy wine sent by container ship from Bordeaux to a port in New Jersey than to buy American with a wine from Napa Valley, which would be trucked across the country.A wine shipped straight from Bordeaux would have to be trucked to Columbus, Ohio, before it matched the greenhouse gas impact of a Napa Valley wine trucked to the same point.Half-lives can be calculated from measurements on the change in mass of a nuclide and the time it takes to occur.The only thing we know is that in the time of that substance's half-life, half of the original nuclei will disintegrate.
Most of the West Coast wines are shipped east by truck, which results in a large carbon footprint.Vino," enlisted the help of sustainability expert Pablo Päster of Climate CHECK to calculate the carbon footprint of wine, in terms of both its production and transportation.Their findings were published as an American Association of Wine Economists working paper in October 2007.Although chemical changes were sped up or slowed down by changing factors such as temperature, concentration, etc, these factors have no effect on half-life.
Each radioactive isotope will have its own unique half-life that is independent of any of these factors.
Remember, the half-life is the time it takes for half of your sample, no matter how much you have, to remain.