In article
,
gardengal wrote:

On Dec 15, 7:17*am, (Una) wrote:
Yup, plants in the dark *use* oxygen.

* * * * Una

I'm not sure you can say they *use* oxygen.....
http://www.ehow.com/about_5449614_plant-respiration.html
The presence or absence of oxygen determines how the process
(respiration) will progress. If oxygen is present, products from
glycolysis will be used within the mitochondria, or energy centers, of
the cell, to continue respiration. If oxygen is not present,
fermentation, a less efficient use of energy, occurs.

during the day when
photosynthesis is going on, they emit oxygen but at night when
photosynthesis is NOT active they release carbon dioxide. Not quite
the same as *using* oxygen :-) Many - if not most - houseplants are
considered to be beneficial to indoor air quality. In addition to
releasing oxygen, they also are able to filter various toxins. The
issue is the light levels during the day when photosynthesis is
active. Ideally, you would want pretty high light levels so as to
maximize photosynthesis but at night the issue is moot. Googling will
turn up various listings of plants considered being the most efficient
at improving indoor air quality; here is one to get you going:
http://www.dannylipford.com/best-hou...r-air-quality/

Several of these are tolerant of quite low light levels so may be more
appropriate for a bedroom wher light levels, even during the day, tend
to be low. I'd include the peace lily, English ivy, pothos and the
spider plant among these. FWIW, spider plants will grow ANYWHERE and
since they are generally a hanging plant, typically above the reach of
most pets.
--
- Billy
"Fascism should more properly be called corporatism because it is the
merger of state and corporate power." - Benito Mussolini.
http://www.youtube.com/watch?v=MyE5wjc4XOw
http://www.youtube.com/watch?v=b_vN0--mHug