Quast
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Posts: 2359
Registered: 09-02 |
GhostlyDeath said:
Do plants not consume CO2 during the day
Yes, but depending on the type of photosynthesis any particular species utilizes additional atmospheric co2 may or may not be used to promote growth. It depends on how they intake co2.
It's best not to think of plants as some kind of monolithic co2 vacuum cleaner, particularly in regard to the amount of fossil fuels we burn. While plants do a good job of it, we are releasing vast stores of carbon that have accumulated over hundred of millions of years and plantlife on earth simply cannot fix it back into biomass at anywhere near the rate we output it.
Fun fact, plants that can benefit from increased co2 levels tend to fare rather poorly in hot climates. This is because they close the pores that would otherwise transpire water in order to conserve moisture and not dry out, but those pores are how they intake co2.
(and consume O2 during the night)?
Not from the atmosphere.
Not to mention that as time passes, the Sun grows hotter and hotter.
As the sun looses mass it becomes hotter, yes. But you're talking about a <1% rise in surface temps over the course of the next few billion years.
Last edited by Quast on 11-28-12 at 11:16
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11-27-12 20:51 
