Hi Mod,
"CO2 is not a pollutant but a plant food".
Ouch! That's painful. It's such a stupidly false dichotomy he's painting. "Plant food" can be a serious pollutant. Anyone who knows anything about conservation will know about nitrogen fertiliser run-off from farming and its disastrous effects on nitrogen-poor habitats like woodland and grassland. Come to think of it, you'd kinda expect a geologist to know that too...
Mutate and Survive