1. ozone layer
2. Ozone layerThe ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (O3). However, "relatively high," in the case of ozone, is still very small with regard to ordinary oxygen, and is less than 10 parts per million, with the average ozone concentration in Earth's atmosphere being only about 0.6 parts per million.
Read “Ozone layer” on English Wikipedia
Read “オゾン層” on Japanese Wikipedia
Read “Ozone layer” on DBpedia
Read “Ozone layer” on English Wikipedia
Read “オゾン層” on Japanese Wikipedia
Read “Ozone layer” on DBpedia
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