I have also seen studies about CO2/allergy connection. Also about how certain plants (ivy) and vines thrive with Higher CO2. Those studies have a scientific base, but again, there are a number of factors..not just GW.

I get so wound up when "experts" pin an effect on a single cause. Tunnel vision does not work on a global scale. Nor does basing 200 years of data for predicting climate changes. It's all about scale (like the comparison of time against distance)

The bee thing is a very serious issue. A few months ago I bought two set-ups for hives. In spring I will set them up. I have contacted people at Penn State and they are "watching" the issue. The more information they can get, the sooner the solution can be had.