| What do you do? http://www.tilamaito.info/whistlermedicalmarijuanacom-1726.pdf mediquip.com.au
The ice core is more than two miles deep and covers 68,000 years. So far, however, data have been examined only from layers extending back 30,000 years. Closer to the surface, one meter of ice covers one year, but at greater depths the yearlong layers are compacted to centimeters.
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