Effect by increasing the proportion of greenhouse gases in the air Although scientists are still researching many details of greenhouse warming, the basic principles of the greenhouse effect were discovered in the nineteenth century and are accepted by virtually all scientists Greenhouse Gases Greenhouse gases are gases that can trap heatWithout the greenhouse effect the mean temperature on Earth would be 18°C and there would be very little or no life So the greenhouse effect itself is a good thing The greenhouse effectCauses of global warming The greenhouse effect The average surface temperature of Earth is maintained by a balance of various forms of solar and terrestrial radiation Solar radiation is often called "shortwave" radiation because the frequencies of the radiation are relatively high and the wavelengths relatively short—close to the visible portion of the electromagnetic spectrum
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