I give in
You've not read the posts above where we talk about CO being a safety issue - thus the story
You've not read the CBA either, especially section 3.5.
fin
Gary
The main studies relied on in this paper are the Victoria Transport Policy Institute (VTPI
2005), the European Commission’s air pollution damage estimates (EC 2005) and estimates
imputed from the Bureau of Transport and Regional Economics health costs of motor
vehicle emissions estimates (BTRE 2005 and 2003).
As described in the modelling sections, the data we used reports hydrocarbon (HC)
emissions and not volatile organic compounds (VOC), but the studies reported here use
VOC. To convert from HCs to VOCs we used a conversion factor of 1, in other words we
use HCs and VOCs interchangeably. According to the US EPA, the conversion factor for
non-road engines is 1.034 for two strokes and 0.933 for four strokes, but this is based on
very sparse data. Using VOCs and HCs interchangeably therefore provides a conservative
estimate.
The Bureau of Transport and Regional Economics (BTRE) quantified the health impacts of
transport emissions in Australia. Following Kunzli et al (2000) and Fisher et al (2002), they
used PM
10 emissions as a surrogate for all air pollution related health impacts. Using their
estimate of health damages from motor vehicle related air pollution for Australian capital
cities (BTRE 2005, p100) and the BTREs estimate of PM
10 emissions in Australian capital
cities (BTRE 2003, p125), the implied health cost per ton of PM
10 emissions as a surrogate
for air pollution from motor vehicle emissions in today’s dollars is between $136,000 and
$324,000, with a best estimate of $230,000 per ton of combustion-related PM
10.26 The large
range reflects uncertainty about motor vehicle related particle emissions, and the value of
life years lost, and the median value of a statistical life. This analysis only considers health
related damages from a subset of combustion emissions in motor vehicles, and omits some
harmful gases as well as environmental harm, including to crops and equipment. The
BTRE’s estimates are therefore likely to be conservative.
The European Commission funded a major study to provide estimates of the damages per
tonne emission of PM
2.5, NH3, SO2, NOx and VOCs from each EU25 member state
(excluding Cyprus) and surrounding seas to update previous estimates and to inform its
Clean Air for Europe (CAFE) program (EC 2005). The range provided takes account of
variation in the method used to value mortality, reflecting the use of the median and mean
estimates of the value of a life year (VOLY) from NewExt (2004) (€50,000 and €120,000
respectively in 2000 €), and the use of the median and mean estimates of the value of
statistical life (VSL), also from NewExt (€980,000 and €2,000,000 respectively). The range is
shown in Table 3-11 and also includes sensitivity to the effects quantified and to the use of
a zero cut-point for assessment of ozone impacts. Again, the study omits a number of
gases emitted from combustion engines and, aside from some agricultural impacts from
the emissions of sulphur oxides (not used in our study), quantifies mainly health effects
and produces figures that are therefore conservative.
We added a composite medium case to the estimates provided by the EC, averaging across
the low sea case and the high land case for our central estimate. This is reasonable for
Australia because the population density is lower than in most of Europe and this
provides a conservative estimate of emissions on land and in estuaries. We used this
composite medium case for our best estimate of the net benefits from the policy options.