Question

How do volcanoes contribute to O3 depletion?

Answer 1

Volcanic eruptions can actually impact the ozone layer if they're strong enough; that is, if they blast gases (such as sulfur dioxide) and volcanic particles so high that these particles manage to reach the stratosphere.Ozone is depleted by a catalytic reaction involving a chemical called a chlorine radical.

Answer 2

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• Scientists have found that particles, or aerosols, produced by major volcanic eruptions accelerate ozone destruction. The particles themselves do not directly destroy ozone but they do provide a surface upon which chemical reactions can take place. This enhances chlorine-driven ozone depletion.