Carbon dioxide (CO2) has been designated as an atmospheric pollutant and a threat to life on Planet Earth by the Environmental Protection Agency (EPA).

To see how much of a threat it really is, read this summary of a report (PDF, 14 pages, 2.03 MB) that explains the “55 Benefits of Atmospheric CO2 Enrichment”. The areas in which carbon dioxide actually helps the environment are listed below:

Air Pollution Stress (Non–Ozone)
Air Pollution Stress (Ozone)
Avoiding Human Starvation and
Plant and Animal Extinctions
Bacteria
Biodiversity
Biogenic Volatile Organic Compounds
Biomass
C4 Plants
CAM Plants
Carbon Sequestration
Diseases of Plants
Early Growth
Earthworms
Evolution
Flowers
Fluctuating Asymmetry
Glomalin
Health-Promoting Substances
Herbivory
Hormones
Human Longevity
Human Mortality (All Causes)
Human Mortality (Cardiovascular)
Human Mortality (Respiratory)
Iodocompounds
Isoprene
Light Stress
Lipids
Medicinal Plants
Monoterpenes
Nectar
Net Primary Productivity
Nitrogen Fixation
Nutrient Acquisition
Phosphorus Acquisition
Photosynthesis
Progressive Nitrogen Limitation
Reactive Oxygen Species
Root Exudation
Root Production
Salinity Stress
Seeds
Soil Erosion
Soil Toxicity
Starch
Tannins
Temperature Stress
Thylakoid Membranes
Transpiration
UV-B Radiation Stress
Vegetative Storage Proteins
Water Stress
Water-Use Efficiency
Weeds
Wood Density