In 1996, after 20 years of debate and pushback from oil lobbyists, New Zealand banned the use of leaded gasoline in cars. An exception, however, remained, with leaded petrol still permitted for use in light aircraft, helicopters and motor racing. Lead, even in small doses, has been linked to negative health effects including neurodevelopmental disorders.
I spoke with Dr John Horrocks, an independent researcher who, in collaboration with University of Otago Public Health Professor Nick Wilson, published a briefing on the continued use of lead in New Zealand. We discussed why leaded petrol is still being used, what health effects it might have, and what we can do to phase its use out.