Smith said the new targets were "economically responsible", citing government calculations that show that a 15 per cent reduction in emissions from 1990 levels by 2020 would cost each New Zealander NZ$1,400 ($942, £564) a year, or NZ$5,600 in reduced annual income for a family of four.
However, green groups were quick to criticise the new targets, which are far less ambitious than had been originally expected when the government last year committed to make the country "climate neutral"



