[James001]

Really?

You're going to extrapolate from lower nitrogen levels in plants in higher CO2 conditions (without a citation, might i add) to higher CO2 levels causing overall lower nutrition? and more aggressive soil depletion? Keep in mind that obviously more plant growth means more plant decay which cycles back int othe ecosystem.

Are you trying to suggest that we should be decreasing agricultural yields so as to prevent soil depletion? There are better ways.

[mikeash]

"without a citation, might i add"

Odd card to play when your comment had no citations either, and you seem to be ignoring my request for them....

[James001]

It's well established that increased CO2 leads to increased plant biomass, thereby satisfying my claim that it leads to increased agricultural yield (as per greenhouses for example).

My claim that increased CO2 leads to more biodiversity is more tenuous but is more likely than a decrease in biodiversity, all other factors being controlled for.