Space shuttle engines combine liquid hydrogen and liquid oxygen to produce an explosive reaction which releases great amounts of energy. a positive feature of this reaction is that no pollutants are produced, as they are in hydrocarbon combustions. the only product is water.
what is the chemical equation?

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explanation:

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.