More on CO2....It's good for plants! Duh!

This article is cracking me up. Headline: Higher CO2 levels may be good for plants. Really? No way!

The comments are even better. JWS said:

CO2 helps plants?!?!?! You mean these “jeenyuses” are just now figuring this out? Because I learned about photosynthesis in 3rd grade. What next? Do sunlight and water also make plants grow?