<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">The planet
Venus is an extreme example of the `greenhouse effect'. Venus is surrounded by clouds which prevent a lot of the Sun's radiation from reaching the surface and so we might have expected the surface to be cool. However, the atmosphere of Venus is largely composed of carbon dioxide which traps most of the radiation from the planet's surface. This is so effective that the surface is heated to 470°C! </div></BLOCKQUOTE>
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