At one point, Scalia questioned whether greenhouse gases should even be considered pollutants, noting that the resulting carbon dioxide is produced in a portion of the atmosphere not in direct contact with people.
The EPA has already found that coal-burning power plants emit 67 of these pollutants, notes the SELC's Suttles.
The IQR-based measures allow us to compare the size of effect estimates across different pollutants within the same pregnancy period, while the ORs for unit increases allow us to compare the size of estimates across different pregnancy periods for a given pollutant (note: since the distributions of pollutants are not the same across pregnancy periods, inter-quartile ranges differ accordingly).
The pulverized rock can release toxic levels of selenium and other pollutants, it noted.
For example, some types of plastics absorb and concentrate environmental pollutants, he notes.
While tyrosine nitration due to environmental air pollutants was noted only recently, protein nitration has previously been described to occur within inflammatory conditions and as a result of the ageing process in the human body [12].
No other sources of pollutants were noted at the investigated sites.
The potential for spatial correlation to result in incorrect variance estimates for exposure outcome measures in time series studies of health effects of air pollutants has been noted (Ramsay et al. 2003a, 2003b).
However, current knowledge of these detailed biologic processes is still quite limited for most chemicals and pollutants, and as noted by Hoel (1997) [L]ow-dose linearity is speculative and it is a reasonable assumption for public health purposes in those instances where there is no scientific evidence to the contrary.
If the pollutants are uncorrelated, we note that ∏ P p = 1 JHR p = ∏ P p = 1 IHR p, where IHR p denotes the hazard ratio of the pth pollutant from a survival model that contains only this pollutant, and thus the association with each pollutant is estimated independent of the other pollutants.
