Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
With rainfall, I should think. The news item up there speaks of 5cm below the surface. (Did they choose that depth, did they also analyse surface dust, I don't know). But one would expect particles to have been washed below the surface by rain. Plants would be absorbing by roots and leaves.
by afew (afew(a in a circle)eurotrib_dot_com) on Wed Mar 23rd, 2011 at 01:12:15 PM EST
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