Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Politics : The Environmentalist Thread -- Ignore unavailable to you. Want to Upgrade?

To: Thomas A Watson who wrote (22300)	7/19/2008 1:14:44 PM
From: maceng2	Read Replies (2) \| Respond to of 36917

Real greenhouses en.wikipedia.org The term 'greenhouse effect' originally came from the greenhouses used for gardening, but it is a misnomer because greenhouses operate differently.[19][20][21] A greenhouse is built of glass. It heats up mainly because the sun warms the ground inside it and this warms the air in the greenhouse. The air continues to heat because it is confined within the greenhouse, unlike the environment outside the greenhouse where warm air near the surface rises and mixes with cooler air aloft. This can be demonstrated by opening a small window near the roof of a greenhouse: the temperature will drop considerably. It has also been demonstrated experimentally (Wood, 1909): a "greenhouse" built of rock salt (which is transparent to infrared radiation) heats up just as one built of glass does. Greenhouses thus work primarily by preventing convection;[21] the atmospheric greenhouse effect however reduces radiation loss, not convection.[21] It is quite common, however, to find sources that make the erroneous "greenhouse" analogy.[22] [23] Although the primary mechanism for warming greenhouses is the prevention of mixing with the free atmosphere, the radiative properties of the glazing can still be important to commercial growers. With the modern development of new plastic surfaces and glazings for greenhouses, this has permitted construction of greenhouses which selectively control radiation transmittance in order to better control the growing environment.[24] en.wikipedia.org May light flow forth and illuminate. Let the 2nd law of Thermodynamics be with you, (n+1)!