Which among the following is measured by Dobson unit ?
AOzone concentration
BThermal conductivity
CSoil moisture
DRadiation
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How does eutrophication contribute to the aging of a lake?
ഇനിപ്പറയുന്നവയിൽ ഏതാണ് മിനമാറ്റ രോഗത്തിന് കാരണമാകുന്നത്?
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