Sentences with phrase «by ultraviolet radiation from the sun»

On Earth, oxygen, ozone and methane eliminate each other rapidly and other gases are destroyed by ultraviolet radiation from the sun.

They are caused by ultraviolet radiation from the sun.

Not exact matches

Methane could also have a nonbiological source, perhaps generated by chemical reactions between water and minerals in Martian rocks or from reactions between the sun's ultraviolet radiation and cosmic dust.

For example, from laboratory experiments we can determine the amount of amino acids produced per photon of ultraviolet radiation, and from our knowledge of stellar evolution we can calculate the amount of ultraviolet radiation emitted by the sun over the first billion years of the existence of the earth.

Unlike ozone in the stratosphere, which benefits life on Earth by blocking ultraviolet radiation from the Sun, ground - level ozone can trigger a number of health problems.

The Montreal Protocol is a multilateral environmental agreement that is successfully preventing massive damage to human health and the environment from excessive ultraviolet radiation from the sun by phasing out the production and consumption of substances that deplete the ozone layer.

-LSB-...] This rise in temperature is caused by the absorption of ultraviolet (UV) radiation from the Sun by the ozone layer.»