[aliasEli]

> Much more commonly plants are limited by access to nutrients and sunlight.

In many parts of the world water is also pretty important. We know that global warming will change global air currents, but is pretty difficult to predict how this will affect precipitation.

[mikeyouse]

Yep - very good point - you can easily see my bias here since our "plants" were suspended in water (an algae farm) so it was never a concern for us - but if you look at the basic photosynthetic formula you need as many molecules of water as you do of CO2.