What natural condition can change the level of CO2 at which ...

[panfilo]

What natural condition can change the level of CO2 at which optimal plant growth occurs and how is it changed?
 
  What will be an ideal response?

Question 2

Shortly after pasteurization, a fungal mat sometimes develops on the surface of the substrate. Is this pathogenic to the next crop?
 
  What will be an ideal response?

[cassie_ragen]

Answer to Question 1

Light intensity. As light intensity increases toward the optimal level for
the crop, the level of CO2 at which optimal growth occurs also rises.

Answer to Question 2

No.

[panfilo]

TYSM

[jomama]

Thanks for the timely response, appreciate it