Hydrogen peroxide has nearly the same molecular structure as water (H2O).The difference is that it contains an additional atom of oxygen; therefore its chemical name is H2O2. In the atmosphere, hydrogen peroxide is formed after oxygen combines with sunlight and becomes ozone (O3). As the ozone interacts with water (clouds), hydrogen peroxide is formed. It then comes down in rainwater, cleansing the landscape and oxygenating the soil, lakes and seas.

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