Material in this section originates from the following categories in our Subject Index:

Carbon Dioxide (Health Effects: Health-Harming Substances)
Health Effects (Carbon Dioxide: Health-Harming Substances)

Material preceded by an asterisk (*) was posted after this subject summary was written and therefore is not included in the summary.  This material will be integrated into the summary at a later date.

Summary

* -- Opiate Production by Poppies

* -- Growth Histories of Temperate Forest Lianas

The Net Effect of Elevated CO2 and the Earlier Occurrence of Biological Spring on Production of Allergenic Ragweed Pollen

CO2 and Poison Ivy

Effects of Elevated CO2 on Nicotine Content and Spread of Potato Virus Y in Tobacco Plants

Atmospheric CO2 and Allergies: Are They Related?

Pollen Production by Ragweed in a Doubled-CO2 Atmosphere

Effects of Long-Term Elevated CO2 Exposure on a Noxious Weed