Great if you like woody material (cellulose and lignin) which increase with higher levels of CO2. Lousy if you like food (sugars, starches, vitamins, minerals, etc) which are reduced as the stomata close up to protect the plant from too much CO2.

And totally irrelevant to the main problem of AGW which is climate change from higher average surface temperature (a key driver of the winds, currents, precipitation, etc).

Their silly nonsense gets more abstract by the day.