En het is nu net die limiet van beschikbare fossiele brandstoffen die het [CO2] nooit boven de lichamelijk critische waarde kunnen laten komen.
Nu is de [CO
2] 380 ppm, oftewel nog net niet 0,04%. 5% [CO
2] is meer dan 100x zo hoog.
Dat kan nooit bereikt worden, een wonder uitgesloten. Een groot deel van de fossiele brandstoffen zal bovendien onwinbaar blijven. Op de ASPO-USA conferentie over peak oil meldde Udall: "Is our obsession with climate change dangerous ? It's distracting us from the more immediate peril we're in. Climate modelers really don't understand energy."
Bij het zoeken naar concentraties binnenshuis kwam ik de volgende publicatie tegen. Het onderstreept het belang van regelmatig de ramen openzetten, niet vanwege de [CO2] (0,05-0,1% is niet verontrustend) maar vanwege de begeleidende concentratie aan allergenen en de luchtwegen irriterende stoffen.
EFFECT OF INDOOR CO2 CONCENTRATIONS ON WHEEZING ATTACKS IN CHILDREN
It was of interest that wheezing attacks in children with asthma were associated with indoor CO2 concentrations and not associated with other indoor air pollutants such as CO, NO2, aldehyde, etc. and allergens. These findings suggest that indoor CO2 concentrations may be an approximate surrogate for indoor concentrations of other pollutants and housing factors, because indoor CO2 concentrations are strongly correlated with home ventilation. In addition, children who live in high CO2 concentrations may be much more exposed to other indoor air pollutants because of the insufficient ventilations issue (Apte MG, et al., 2000). In our study, we
could not confirm, whether indoor CO2 concentrations were an independent risk factor of wheezing attacks or an indicator of the other indoor air pollutants. Our study was limited, so the associations between indoor air pollutants and wheezing attacks may be biased because the study subjects were not representative of the general population as we could not get a sufficient sample size, especially in the case of children with asthma.
CONCLUSION AND IMPLICATIONS In this study, we endeavoured to investigate the association between indoor air pollutants and wheezing attacks. Of the many indoor environmental factors and housing factors, only a few showed an association. Indoor CO2 concentration for children with asthma history was the most important factor in wheezing attacks. And indoor CO2 concentrations are indicator for ventilated condition in modern buildings.
This finding suggests that indoor CO2 concentrations may be an approximate surrogate for indoor concentrations of other pollutants and housing factors.