Carmakers ‘grossly under-reporting’ emissions as Australia starts real-world tests

Analysis finds difference between greenhouse gas emissions the automakers declared and the researchers' estimates averaged 27%

Some of the world's biggest automakers are still grossly under-reporting" greenhouse gas emissions, according to a new report, despite improvements in their estimates.

The research, undertaken by consultancy firms Carbon Tracker and Nomisma, was released on Wednesday and found car manufacturers ranked among the world's highest carbon producers and needed to improve the way they declared their environmental impacts.