The greenhouse effect: blew ozone, this floor has the effect of preventing ultraviolet light shone down to EarthThe process of industrialization, modern biochemistry donation range type of injection factory emissions, waste directly into the environment, smoke dust of vehicles The forest was destroyed off causing the sun shone down on the earth floor of green tree, no block should directly back to the ground, Burnt forest, volcanic eruptions also generated 1 large volumes of CO2
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