Planet Earth has its own natural sunscreen that shields us from the sun's damaging ultraviolet radiation. It's called the ozone layer: a fragile band of gases beginning 15 kilometres above our planet, and reaching up to the 40-kilometre level. Human activities have caused a substantial thinning of this protective covering — not only over the North and South Poles, but right over our heads. Stopping ozone layer depletion is one of the major challenges facing the world today. The stakes are incredibly high. For the ozone layer is truly a "conserver of life," essential to the survival of all living things.
BC Ministry of Water Land and Air Protection. 2002. Stratospheric Ozone Depletion. BC Ministry of Water Land and Air Protection
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