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The New Zealand Government’s energy policies need to
consider public health benefits
The New Zealand Government has recently released a
discussion document on “Creating a Sustainable Energy
System.”1 This document is helpful in
that it recognises both the approaching end of cheap oil and the threat posed by
climate change (around which the scientific consensus is now very
strong2). However as energy policies have links
with public health, it is of concern that it fails to adequately consider the
health benefits and costs of various energy policies.
In only two places does the document specifically mention
energy-associated health issues: first that poorly insulated and inadequately
heated homes are risk factors for poor health; and second that motor vehicle
emissions contribute to the air pollution burden on health (although it does not
bring a comprehensive approach to the air pollution burden as it ignores other
emission sources such as thermal power stations). Although these two issues are
important, there are many other ways in which a nation’s energy policies
may affect its citizens’ health.
The health benefits that might arise from such energy
policies as introducing carbon charges (scheduled for New Zealand in April
20073) include the following:
- Reduced
harm from multiple sources of air pollution—Carbon charges (if not
blunted by negotiated agreements that allow avoidance of charges) are likely to
impact on the extent of coal burning for industrial and domestic use, to
encourage use of more fuel efficient vehicles, and even to slow the growth in
usage rates of private vehicle transportation. For example, fuel price rises
have led to greater usage rates of public transport in the past (as documented
in Auckland after petrol price increases in
20004).
Such changes may help
to limit air pollution and to protect health, given that particulate air
pollution (from vehicles and other sources) is estimated to cause around 970
premature deaths each year in New Zealand.5 In
particular, air pollution has been associated with increased risk of
hospitalisation or death in a number of New Zealand
cities.6–9 These impacts are consistent
with growing international evidence for adverse health impacts from air
pollution.10–12
The harm from motor vehicle
emissions would be further reduced if vehicle tuning and emission measurement as
part of warrant of fitness checks were required.
- Reduced
harm from injury—If carbon charges encouraged greater use of buses
and trains, this would reduce overall road traffic injury rates as these forms
of transport are much safer per kilometre travelled than car travel. In New
Zealand, substantial reductions in fatal vehicle crashes were significantly
associated with the fuel price increases of the 1979 oil
crisis.13 Similarly, United States data
indicates that higher fuel taxes have reduced vehicle crash
fatalities.14 The Intergovernmental Panel on
Climate Change has also reported that controlling road traffic would benefit
health through reductions in road traffic crashes.
Any reduction in
traffic volumes may also make cycling and walking relatively safer and more
acceptable for commuters, and thus increase physical activity levels.
- Potential
health benefits of tax reform—The additional revenue from carbon
charges provides the Government with more opportunity to lower GST or make other
tax reforms (e.g. making childcare a tax-deductible expense). If such reforms
helped reduced poverty levels, then it could benefit public health as well as
reducing health inequalities.
Finally, if New
Zealand and other countries work together to reduce fossil fuel use globally,
this will contribute to minimising the likely adverse health effects associated
with greenhouse gas induced climate change. These include the expanded ranges of
disease vectors such as mosquitoes;15,16 the
adverse effects on food production (and hence nutrition); and extreme weather
events such as floods, storms, and heat waves.
These potential health effects need to be considered in
designing future energy policies. Given the health issues involved, health
professionals should actively critique proposed government energy policies, and
advocate for those policies that are both environmentally sustainable and
pro-health.
Nick Wilson Senior
Lecturer (Public Health)Wellington
School of Medicine and Health
Sciences(nwilson@actrix.gen.nz)
Competing
interests: All of the authors are
voluntary and unpaid members of the Climate Defence Network.
- New
Zealand Government. Sustainable Energy: Creating a Sustainable Energy
System”. Wellington: Ministry of Economic Development, 2004. Available
online. URL: http://www.med.govt.nz/ers/environment/sustainable-energy/discussion/full-version/
Accessed May 2005.
- Oreskes
N. The scientific consensus on climate change. Science. 2004;306:1686.
- New
Zealand Herald. Full text: Budget speech. 19 May 2005. Available online. URL: http://www.nzherald.co.nz/index.cfm?c_id=561&ObjectID=10126351
Accessed 28 May 2005.
- Auckland
Regional Council. Annual public transportation usage data for Auckland 1991-2001
(unpublished data). Auckland: ARC; 2002.
- Fisher
GW, Rolfe KA, Kjellstrom T, et al. Health effects due to motor vehicle air
pollution in New Zealand. Report to the Ministry of Transport. Wellington:
Ministry of Transport, 2002. Available online. URL: http://www.arc.govt.nz/arc/library/c41150_2.pdf
Accessed May 2005.
- McGowan
JA, Hider RN, Chacko E, Town GI. Particulate air pollution and hospital
admissions in Christchurch, New Zealand. Aust N Z J Public Health.
2002;26:23–9.
- Hales
S, Salmond C, Town GI, et al. Daily mortality in relation to weather and air
pollution in Christchurch, New Zealand. Aust N Z J Public Health.
2000;24:89–91.
- Scoggins
A, Kjellstrom T, Fisher G, et al. Spatial analysis of annual air pollution
exposure and mortality. Sci Total Environ. 2004;321:71–85.
- Barnett
AG, Williams GM, Schwartz J, et al. Air Pollution and Child Respiratory Health:
a Case-crossover Study in Australia and New Zealand. Am J Respir Crit Care Med.
2005 (Published ahead of print – 11 March 2005);
doi:10.1164/rccm.200411-1586OC.
- Sram
RJ, Binkova B, Dejmek J, Bobak M. Ambient air pollution and pregnancy outcomes:
a review of the literature. Environ Health Perspect. 2005;113:375–82.
Available online. URL: http://ehp.niehs.nih.gov/members/2005/6362/6362.html
Accessed May 2005.
- Tatum
AJ, Shapiro GG. The effects of outdoor air pollution and tobacco smoke on
asthma. Immunol Allergy Clin North Am. 2005;25:15–30.
- Kunzli
N, Jerrett M, Mack WJ, et al. Ambient air pollution and atherosclerosis in Los
Angeles. Environ Health Perspect. 2005;113:201–6. Available online. URL:
http://ehp.niehs.nih.gov/members/2004/7523/7523.html
Accessed May 2005.
- Scuffham
PA, Langley JD. A model of traffic crashes in New Zealand. Accid Anal Prev.
2002;34:673–87.
- Leigh
JP, Frank AL. Gas taxes and motor vehicle fatalities. J Health Politics Policy
Law. 1988;13:723–34.
- Intergovernmental
Panel on Climate Change. Human health (Chapter 9). In: Climate Change 2001:
Impacts, Adaptation, and Vulnerability. Geneva: IPCC; 2001. Available online.
URL: http://www.ami.ac.cn/climatechange2/IPCC_report/II9910/third/Tfd09_ALL.pdf
Accessed May 2005.
- Bunyavanich
S, Landrigan CP, McMichael AJ, Epstein PR. The impact of climate change on child
health. Ambul Pediatr.
2003;3:44–52.
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