Ian Parry is the Environmental Fiscal Policy Expert at the International Monetary Fund. He came to speak at a series of events in New Zealand about tax. It doesn’t get more exciting than that. But there’s more. Ian is a specialist in carbon pricing, emission trading schemes, and the role of fiscal policy in climate mitigation. The timing couldn’t be better, with New Zealand wrestling with changes to the ETS, price drops and then recovery in the carbon market, and growing skepticism about the veracity of offsetting and claims about carbon neutrality. He spoke to Vincent.