[froggy]

i guess i dont understand what is the reason u want a 'greenhouse effect' ?

the reason a greenhouse grows such a good product is;

beautiful beautiful sunlight.
air exchanges readily.
watering ease.
most growers that have a greenhouse know wtf they are doing so they use good soil and dont over water or fert, etc.

but one of the most important things about growing in greenhouses is to PREVENT the greenhouse effect. meaning that heat is usually ur enemy. most greenhouses try to eleminate this by continued air exchanges and uses of fan systems.

another thing that can go wrong in greenhouse is the humidity. again u can exchange ur air away from this problem in a greenhouse but in a sealed room in ur basement is another story. the lower the humidity the better.

but the actually name 'the greenhouse effect' is that co2 (or other greenhouse gases) traps heat into a 'system' (most ppl think of this in terms of the earth but like thug mentioned, this can also happen in places like a rainforest or cities.) i dont think u wanna trap heat in. u want a self containing unit, not the greenhouse effect.

good idea but wrong jargin.