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1988 Press Photo Greenhouse effect pollution gases

Description
Caption: Theory of the greenhouse effectFactories and other sources of pollution emit gases such as carbon dioxide, nitrous oxides, chlorofluorocarbons and methane. Accumulating in the atmosphere, the gases encircle the planet. Pollution layer works as an insulating barrier, retaining heat from the earth. As though surrounded by the panels of a greenhouse, the planet becomes hotter year by year.

The front and back of this photograph are pictured below.

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