In August of 2006 EPA General Counsel Robert Fabricant concluded that since the Clean Air Act does not specifically authorize regulation to address climate change, CO as a pollutant is based upon the fact that it is a natural component of the atmosphere and needed by plants in order to carry out photosynthesis.No one would argue the fact that carbon dioxide is a necessary component of the atmosphere any more than one would argue the fact that Vitamin D is necessary in the human diet.Aerosols have a measurable effect on climate change.Light-colored aerosol particles can reflect incoming energy from the sun in cloud-free air and dark particles can absorb it.This portrait of global aerosols was produced by a GEOS-5 simulation at a 10-kilometer resolution.Dust (red) is lifted from the surface, sea salt (blue) swirls inside cyclones, smoke (green) rises from fires, and sulfate particles (white) stream from volcanoes and fossil fuel emissions.
The highest levels of CO typically occur during the colder months of the year when inversion conditions (when the air pollution becomes trapped near the ground beneath a layer of warm air) are more frequent.
As a result of the reversal of the 1998 decision, automobile manufacturers and power plants have been able to avoid making costly modifications that would have been required under the 1998 ruling.
In 2006 environmental groups pushed for legislation that would reinstate carbon dioxide as a pollutant.
However, excess Vitamin D in the diet can be extremely toxic .
Living systems, be they an ecosystem or an organism, require that a delicate balance be maintained between certain elements and/or compounds in order for the system to function normally.