900,000-Tonne Miscalculation Makes Carbon Target Even TougherKate Newton , Climate Change CorrespondentA miscalculation has left New Zealand with less wiggle-room to meet all of its planned greenhouse gas savings. The Ministry for the Environment said the proportion of diesel cars in the country's vehicle fleet was under-reported, leading to the error. The emissions budget for 2026 to 2030 is still on track despite the mistake, the ministry said. However, the buffer has shrunk, from 4.5 million tonnes of greenhouse gases to 3.6 million tonnes - just a 1.2 percent buffer for the overall budget of 305 million tonnes. It was "likely" that a pricing scheme would have helped to reduce emissions once it was implemented, the amendment said.